All the secrets of iPhone 7. Other lenses and camera sensor. Creating a letter password for unlocking

The iPhone is known to be a very useful thing, but it has hidden functions that many people are not even aware of. For example, not every owner of an Apple gadget knows that his phone contains a map of all the places he has visited, or that he can control the screen by turning his head.

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We invite you to familiarize yourself with fifteen useful features that will make you a truly “advanced” iPhone user.

Re-entering the most frequently used text and phrases each time is a very annoying procedure.

In order, say, not to constantly enter the same email address, iPhone can be trained to give hints. The user can type, for example, “soap”, and the entire address will appear on the screen. To do this you need to go to the menu “ Settings", In chapter " Basic" choose " Keyboard" and click on the item " Replacing text».

Click here + in the right top corner, in field Phrase enter the full phrase (in our case yablyk@site), and in the Abbreviation field enter the desired abbreviation, for example “soap”..

In this way you can easily enter, for example, passport data, full name, etc. Try it, it's very convenient.

How to add and change the order of virtual keyboards


Working with iPhone installed by default standard keyboard does not allow for maximum use of its full potential. Exists whole line applications that add a lot of interesting and useful functions– from translating text into foreign language to sending funny GIFs.

Try using, for example, one of third party keyboards posted below:

Activate new keyboard After installing it, you can follow the path: Settings -> Basic -> Keyboard -> Keyboards -> New keyboards.

To use the keyboard, you must provide it with full access to iOS. To do this, click on the name of the keyboard and move the switch to the ON position, then confirm your intentions by selecting the option Allow.

The order of keyboards in the list can be changed by clicking on the " Change" in the upper right corner. This will allow you to know exactly which keyboard will appear next when switching.

You can switch the keyboard by clicking on the icon that looks like globe in the lower left corner or in the settings of the active keyboard.

How to turn off calls and notifications at night or at lunchtime

The "" function allows you to disable sound signals for calls, alerts and notifications that arrive on a locked device. The user can schedule a time or select subscribers whose calls are allowed to receive.

In order to activate the function, you need to go to the menu “ Settings" and select " Manually».

This can also be done in Control Center by clicking on the crescent moon icon.

How to control iPhone with your head

You can activate the device control function using head movements by going to Settings -> Basic > Universal access -> and selecting Add new... In chapter Switches.

How to hide some unused native apps that can't be deleted

The iPhone comes with more than a dozen pre-installed applications, which the user cannot delete. This is quite inconvenient, considering that many of them will hardly be used. Be that as it may, some unused applications can be removed from the home screen.

To do this you need to go to " Settings" and in the section " Basic" choose " Restrictions" Then you need to enter a password and specify which icons should be hidden from the home screen.

Unfortunately, you can only hide application icons: Safari, Camera, FaceTime, iTunes Store, Podcasts and News.

How to make the flash light up when making calls, receiving messages and notifications

Many iPhone users who like indicator lights for messages in old phones, they don’t even realize that they can activate this function in an Apple gadget. This can be done by going to Settings -> Basic -> Universal access -> Flash warnings.

How to set different vibration for individual contacts

You can find out who is calling not only by the ringtone, but also by the vibration sound. In order to set a specific vibration for individual contacts, you need to go to Settings -> Sounds -> Ringtone -> Vibration -> Create vibration.

You can set the vibration pattern by tapping on the screen. The created sample must be named and saved.

This vibration will be automatically set as the default for all notifications, so before you exit the menu, you must return previous settings- parameter Not selected.

In order to set the desired vibration for a certain person, you should go to the list of contacts, select the one you need, press the button Change and indicate the saved template in the “ Vibration».

Replying to messages from the lock screen is very simple - just swipe left on the message, thereby activating the " Answer».

You can find out the most energy-consuming applications by going to Settings -> Battery -> Battery usage.

iPhone saves data about all the places you visit and compiles hidden card. In order to view it, you need to go to Settings -> Confidentiality -> Location Services and choose System Services -> Frequently visited places.

All places visited by the user are sorted by city. After clicking on the name of the city, a map will open with an exact indication of the location and time of its visit.

How to enable power saving mode

Extend service life iPhone battery Energy saving mode will help. When the battery level drops to 20%, a notification appears asking you to enter low power mode. However, it can be activated even if the smartphone is fully charged. To do this you need to go to the application " Settings" and select the section " Battery" When the power saving mode is turned on, the battery level indicator turns yellow.

To save battery, non-essential functions such as app updates are disabled. background, Siri and some resource-intensive video effects.

Power saving mode turns off automatically when the device reaches 80% charge.

How to view selfies and screenshots in individual albums in the Photos app

This may be news to some, but the iPhone automatically saves photos taken with the front camera and screenshots separately from the rest.

In order to quickly view the media files sent in the message (photos, videos, coordinates), just click on the “ Details" in the upper right corner.

You can specify the location in the message in the menu " Details" The mark is set indefinitely, for example, for an hour or until the end of the day.

How to reduce the screen brightness level to a level lower than that suggested in the settings

Few people know that by triple-clicking on the display you can reduce the brightness in a way that is not allowed standard settings. This makes using your smartphone at night much more convenient. Activate function triple click can be done as follows. Choose Settings -> Basic -> Universal access -> Increase and in the subsection Magnification area check the box Whole screen.

After triple-tapping the screen with three fingers (you need to touch quickly), a menu will appear in which you need to click on “ Select filter" and check the box next to " Weak light" Now turn the brightness lower installed by Apple minimum by triple tapping the screen.

iPhone 7 has many changes compared to old iPhone 6s is a lot, but I highlight 7 main innovations in the new smartphone.

Home touch button

Sensory Home key simply gorgeous. Taptic Engine, which simulates triggering physical key, forced the case filling to be reworked. This is one of the reasons why the headphone jack was removed from the iPhone 7. But what an unusual sensation in the hand from the operation of this motor! It’s very pleasant to feel a trembling throughout your body, as if it were a living organism. But this is no longer the usual “click” that it used to be. New sensations.

Moisture protection

Apple has finally added a useful feature to its phones; now iPhones are not afraid of water (and beer, as our test showed). Although Apple defended itself from all sides and stated that if moisture is found inside a phone protected by IP67, the owner will be deprived of the warranty. Although who said that the phone should break after the first swim? I think the iPhone 7 will hold up just fine.


Camera

The lens has matured and become larger, now the camera looks neater, although it still protrudes from the body. New 12-megapixel sensor with f/1.8 aperture optical stabilization Focuses faster and also consumes less energy during operation. Alas, but dual camera It's only available on the iPhone 7 Plus; it adds a second camera that helps bring objects closer without losing quality. The front camera has also been improved, FaceTime is now 7 megapixels.


Sound via Lightning

Like it or not, the iPhone 7 now does not have the usual headphone jack. The set includes the well-known EarPods, but now with Lightning at the end. I'm happy for those who like the sound quality of the EarPods, but I'm categorically not satisfied with them. They fall out of your ears, play music poorly, and it’s better to replace them with others as soon as possible.


What options? Buy yourself Bluetooth headphones or go with a 3.5 mm adapter. It looks very so-so, especially in combination with a black phone and a blue headphone cable. If I were Apple, I would think about multi-colored adapters, but Chinese businessmen will happily do this.


Stereo speakers

The role of an additional speaker is played by a conversational speaker, even noticeably stereo. iPhone 7 has become much louder, it’s more pleasant to watch videos in the yard on a bench to the delight of your neighbors, incoming call Don't miss it either, you can always hear the melody perfectly. Moreover, the phone plays very cleanly and powerfully, this is progress.


Iron

New Apple processor The A10 Fusion is 2 times faster than the A8 in the iPhone 6 and 40% more powerful than the iPhone 6. According to the tests, everything is fine, and the speed of working in the menu is also great. Faster, more powerful, stronger: everything is as it should be. Why so much strength? I hope the phone will not lag over time and will last 2-3 years active use. I haven’t used the 6s, I’ve been away from the iPhone 6 Plus for two years, and compared to it, the new one is simply reactive.


Design

There was no fatal change in shape, but the old Space Gray color disappeared, replaced by two black ones: matte and glossy. The first one quickly gets dirty, and the second one is mercilessly scratched, but despite this, it is the Jet Black color that is in high demand. Apple has carefully changed the design of the antennas, now they look much sleeker, the phones are prettier, but the sizes remain the same.


Of course, there are many features on the iPhone that we use. There are dozens of hidden conveniences in the iPhone that you might not be aware of. These are the best iPhone hacks you probably didn't know about. And so we went:

1. Reset on iPhone 7

You may not have noticed that the Home button on the iPhone 7 isn't actually a button, but a sensor. Tactful vibration feedback creates an impression physical button, but is not actually pressed. Therefore, it is completely useless to press it when the phone is frozen or turned off.

And you won’t be able to do the familiar Reset by simultaneously pressing two buttons, Power and Home. Instead, hold down the Power button and the Volume Down button at the same time. Your phone will reboot and start again.

Reset on iPhone 7

2. Fast charging

Tired of waiting for your phone to charge? There is a way to speed up the charging process, and it's surprisingly simple - turn on Airplane mode! In this way, you will minimize the load on the battery and, as a result, charge as quickly as possible. When Airplane mode is turned on, the phone charges 30-40% faster, and this is already about half an hour.

3. Quick input in the address bar

When entering in address bar the name of the site, and then the URL suffix, for example: .ru, .com, .co, .uk, etc. spend some time. To simplify everything, everything has already been invented: after entering the site, hold down the “.” and all the URL suffixes you need will immediately appear. All you have to do is choose the one you need.

4. Your phone knows too much about you, turn it off

A bit of a dirty trick, your iPhone is always collecting data about you in the background - be it the apps you use the most, the amount of data, or even where and how long you were.

To turn it off, go to Settings > Privacy > Location Services > System Services > Frequently Visited Places and turn it off. Here you can see not only where you have been, but also how much time you spent in each place. Apple is really analyzing.

5. Additional tools

You probably filed the Compass app along with the Stocks and Find Friends apps in your Junk or Miscellaneous folder. Now you can pull it back out because it has a second function that will help in repairs or other situations.

No: Don't use your iPhone to hammer nails. Instead, swipe the Compass app from right to left to reveal a very useful digital “Level.” You can check whether that shelf or picture is actually hanging straight, or you can check the flatness of the table or floor.

6. How to lock focus in a standard camera

We all know that tapping the screen while taking a photo will set the camera's focus point, right? Fine. However, every time you move the camera after choosing focus, it changes.

Now, instead of just tapping the screen, tap and hold for a second or two until the AF Locked window appears. Now you can change the frame, rotate and move objects without losing focus.


How to lock focus in standard camera

7. How to create your own vibration

Have you ever wanted to determine who is calling you while your phone is still buzzing in your pocket? Now you can: In the Contacts application, select the desired contact and click “Edit”, then select “Ringtone”, select “Vibration”. Once you select it, you'll get a variety of vibration options, including a Create Your Vibe tool.

Create your own vibration - it's very simple, just press the screen as you would like to make your phone vibrate.

8. Siri training

Siri has a bit of a smug attitude - so there's nothing better than teaching her pronunciation. For example, how she sometimes mispronounces people's names or places the emphasis incorrectly. But now, if Siri says something wrong, just tell her so.

After she makes a mistake, say, "That's not right how you pronounce..." and you'll hear Siri ask you to pronounce the word with the correct accent and then check to make sure everything is correct.

9. Set Music to Automatically Mute

Enjoy listening to soothing music before falling asleep? Then you are probably very familiar with music playing at 3 am or until the early hours of the morning, draining your phone.

Now you can set your music on a timer. In the Clock app, go to Timer. Here, in the “When finished” tag, there is “Stop” at the very end. This will turn off the music, be it Apple Music or other players when the timer reaches zero.

10. Take photos without touching the screen

It often happens that you don’t immediately get into touch button“remove” or you close the display with your fingers and don’t see what kind of frame you’ll get. There are more convenient way- pressing any of the volume buttons while holding the phone by the edges and without covering the screen. Also, pressing the volume buttons on the connected headphones will also take a photo or start and stop video recording.


Selfies, photos and videos using headphones

11. How to limit 3G traffic usage to save money

Using programs and games on your phone, many of them connect to the Internet and waste your traffic without notifying you about it.

Now by going to Settings > cellular» you can disable internet access individual programs, leaving only those that need the Internet. Thus, launching games or applications where the Internet is not needed will not waste traffic.

12. Increased battery life

Spotlight, fast access And Apple search to music, programs, in general, to everything, great for instant access to the Internet.

But what happens in the background drains your battery significantly. If you don't use Spotlight, you can turn it off completely or keep only the apps you need to save battery life. Just go to Settings > General > Spotlight Search and turn off what you don't need.

13. How to improve the signal or iPhone secret menu

No need to run around with your phone, trying to find out where the signal is best received. Enter *3001#12345#* in dialer and press call to start secret iPhone menu. This menu turns your meter into a much more direct numerical indication of signal strength.

To turn it off, simply exit the menu back. Value -50? Then you will enjoy HD video streams, but if around -120 then you will struggle to send SMS. Just follow the numbers to improve your signals. Also in this menu you can see a lot hidden information about the phone and SIM card.

14. How to undo the last action

Perhaps you noticed the message “Do not apply Input”?! So, when working with text, it often happens that a lot of text is erased, or the inserted text replaces the main one, or large text inserted in the wrong place, or other actions that need to be undone.

In such a situation, you just need to shake the phone and a message about canceling the last action will immediately pop up. Very comfortably.


How to cancel last action

15. Back button

On Android, there is a special Back button at the bottom of the screen. While on an iPhone it may be at the top of the screen or at the bottom or absent from the screen. The fact is that it is not needed on the iPhone.

In many apps, from Settings to Safari, simply swipe left to right on the browser or settings screen and iPhone will take you back to previous page or menu. So why is it needed? special button with an arrow at the bottom of the screen when you have such an elegant solution?

16. Home button sensitivity settings

Speaking of tactile feedback on the iPhone 7 Home button, you can adjust the vibration strength using Settings. Just go to Settings > General > Home Button and you can choose the vibration level that suits you.

Video of additional iPhone and iOS secrets

The long-awaited iPhone 7 and iPhone 7 Plus, confirming and denying many rumors. There was also Apple’s signature magic, which fans of the brand had not seen for so long. During the announcement, 10 key features of the new smartphones were noted and below we invite you to familiarize yourself with them.

1.Design

They worked hard on the smartphone and it seems to be brought to mind in every way iPhone sides 6 or 6S. The device looks more streamlined and holistic, the stripes are no longer conspicuous, and the cameras do not stick out so prominently. Matte black color seems to be the most successful and practical, but Jet Black, called “black onyx” in the Russian version, attracts all attention. iPhone processing 7 and 7 Plus in this color borders between glass and metal, the phone seems somehow unreal and cosmic. Alas, increased soiling will quickly leave no trace of this shine.

2. New button Home

Apple loves to reinvent familiar things, in in this case underwent renovation Home button. From now on, it is no longer mechanical, but sensitive to pressure force with reverse tactile communication. This is realized using Force Touch technology and the Taptic Engine drive. Now the button protrudes additional means notifications about the status of the device and can even be used in games for unusual vibration sensations.

3.Protection from water and dust

Yes, now you can throw your iPhone into an aquarium and take it with you to the pool - the IP67 standard allows it to withstand 30 minutes at a depth of up to 1 meter. iPhone 6/6S were not very willing to sink before (withstanding up to 10 minutes of diving), but now they should not be afraid of anything at all. Nevertheless, official guarantee does not apply to drowned people, so be careful.

4. Camera

Apple has upgraded the cameras of both versions of smartphones. iPhone 7 and iPhone 7 Plus have optical image stabilizers, f/1.8 aperture, a new high-speed sensor, 6-lens optics and a new image processing chip that makes them wider in color gamut and brighter. In addition to everything, there is a flash with four LEDs (two warm, two cold).

The main difference between the 7 Plus and the iPhone 7 is the dual camera: 12+12 megapixels, one of which is wide-angle and the other telephoto. This made it possible to implement 2x optical zoom and 10x digital zoom with improved quality. Thanks to software function Sneak Peak iPhone camera 7 Plus can analyze objects and surroundings, automatically adding background blur or bokeh to them. To achieve this, Apple has built a system into the camera app. machine learning, so it's a truly smart camera where you don't have to manually adjust the focus.

Permission front camera increased to 7 megapixels, for selfies and more. They promise improved colors and good digital stabilization.

5. Screens

The panel resolutions haven't changed, but they're 25% brighter, have a wider color gamut, and are now cinema-quality (whatever that means).

6. Stereo speakers

Yes, now there are two speakers. One is in the speaking hole, the other is below, but what used to be the 3.5 mm port hole is now where the microphones are. They promise sound twice as loud and clear as the iPhone 6S.

7. EarPods with Lightning

Since we're talking about abandoning 3.5 mm, we need to talk about bundled headphones with Lightning. In addition, the kit will include a Lightning to 3.5 mm adapter. Why did Apple abandon the usual connector? Yes, because 900 million devices have been created for the proprietary connector, they all connect directly to the iPhone, and the space freed up after removing the bulky 3.5 mm port can be taken by something more useful (new sensors and battery).

8. AirPods and Beats wireless line

Apple insists on the rapid arrival of a wireless future, the abandonment of 3.5 mm should breathe new life into wireless headphones new life. Branded AirPods headphones got a familiar design, but without wires, touch control(you can tap on them to call Siri), a microphone, many sensors and a proprietary W1 chip.

Apparently, these are not exactly Bluetooth headphones, because they can instantly connect to an iPhone and Apple Watch without the need for pairing. You just need to open the box with the battery pack for the headphones. They can also automatically turn on and off, analyze the noise around them and mute it for calls and communication with Siri. AirPods will cost $159, provide from 5 to 24 hours of listening on a single charge with the box, and 15 minutes in the case will give a charge for 3 hours of music.

Apple promises amazing sound quality for such tiny headphones, and they also have best time work among all similar devices. If you don't like their design, the more traditional wireless Beats Solo 3 and new PowerBeats 3 may be to your liking. Or the brand new Beats X.

9. Apple Pay

It was announced on stage that Apple Pay was coming to Japan, but what’s more interesting to us personally is that in the fall of 2016 Apple of the Year Pay will also appear in Russia. Details will be announced later.

10. Performance

For the first time in many years, Apple has moved away from using a 2-core chipset in the iPhone and switched to a 4-core A10 Fusion chipset, providing the most high performance among all modern smartphones(according to Apple).

As usual, technical details of the chipset are not disclosed, so let's talk about processor frequency and gigabytes random access memory we'll find out later. Now it is only known for certain that 2 cores are responsible for the productive mode of use, and 2 more for quiet operations.

Time battery life increased by 1-2 hours compared to the iPhone 6S Plus and 6S. From now on, the iPhone comes with 32 GB of memory by default, and 128 GB and 256 GB versions are also offered. The color “black onyx” will be available for them.

The phones will appear in Russia in the second wave on September 23; you can find prices at this link. In our opinion, new iPhones were a success and Apple made truly modern and current smartphones, which will certainly find a buyer, even despite the abandonment of 3.5 mm. What about the iPhone 7 and 7 Plus confuses us, and what we definitely like - read on the site in two alternative views on Apple’s recent announcement:



Based on materials from Apple

Not everyone knows about these functions!

iOS has many hidden or not-obvious-to-find functions. It's her own fault for their secrecy Apple company, which doesn't adequately cover all the useful features. In this article, we have collected 20 such hidden features. Each of them is really useful, but the main thing is that not all iPhone owners know about their existence.

1. Quickly deleting numbers in the “Calculator”

IN standard calculator On iPhone, you can delete the last digits you dialed. This is very useful option, which helps you avoid typing numbers again for any calculations. If you accidentally type the wrong number, simply swipe left or right on the number line. The extra digit will be deleted immediately.

2. Last number speed dial function

IN standard application"Phone" exists hidden opportunity, allowing you to instantly call back the last contact you dialed. To do this, you just need to double-click the call button and your iPhone will immediately start calling the last outgoing number.

3. Fast continuous shooting

The Camera app has a ton of useful features that Apple doesn't make obvious about for some reason. One of the most useful such features is continuous shooting. It's extremely easy to use. Press and hold the shutter button. As long as you hold down the button, iPhone will take photos. Thus, it is best to photograph subjects in motion.

4. Instant currency conversion

iPhone users don't need additional applications and for currency conversion at the current exchange rate. To transfer an amount from one currency to another, you just need to type the corresponding request in Spotlight search, which opens by swiping down on the home screen.

5. Advanced features of the standard keyboard

Regular iOS keyboard has a whole set additional characters, which are not displayed by default. For example, currency signs, quotation marks and even the letter e. To access them, you need to hold down the symbols that are open by default. Literally in a second a pop-up window will appear with a list of available symbols. Note that the symbols differ depending on which letter or symbol you press.

6. Track your steps without additional apps

Many iPhone users download or even buy special applications to track your steps taken. And not everyone knows that such a function is in the standard Health application (many do not open it at all). Moreover, the application counts steps very accurately, and also takes into account the ascent to floors! Latest feature most step counting apps can't boast of App Store.

7. Improve Touch ID performance

Operation of the fingerprint scanner finger touch The ID on any iPhone can be significantly improved. To do this, you need to register several new prints of the same finger with which you are used to unlock your smartphone (for most people, this is the thumb of the right hand). In this case, it is necessary to register the fingerprint from slightly different angles each time. Thanks to this trick, Touch ID will be much better and more stable at detecting your fingerprint.

8. Scan documents in the Notes app

And one more regarding hidden function iOS can replace separate application from the App Store. There's a great, easy-to-use document scanner built right into the Notes app. To use it, you need to create a new note, click on the “+” icon above the keyboard and select the “Scan documents” menu item that opens. After that, all that remains is to point the camera lens at the iPhone. The document will be automatically detected by the scanner, but you will have the opportunity to adjust the scanning accuracy.

9. Opening an Accidentally Closed Tab in Safari

If you accidentally closed a tab in Safari and want to quickly open it, there is a convenient way to do this. Go to view menu open pages and hold down the “+” button. In a second, a page will open where all the recent items will be collected. closed tabs. Thanks to this method, you don’t have to go into your history to reopen an accidentally closed tab.

10. Open a link in Safari in a new tab

A cool and useful trick in Safari that even many people don’t know experienced users. In order to open any link in a new tab, just click on it with two fingers of one hand at the same time. This Safari feature is a huge time saver.

11. Filters in the Photos app

It's a real mystery, but almost no one uses the filters offered in the Photos app. Or few people know about them. But right in the Photos application you can full-time job over any photo and significantly improve it. Among the proposed tools there are filters that are familiar to everyone, which will improve your photo in one click.

12. Accelerated character set

If you want to type text that's mostly letters and only a couple of numbers or symbols, there's a cool trick that will make it faster. You don't need to waste time and switch to the symbol layout every time. In order to quickly type the desired character or number, you need to hold down the “123” button (which is responsible for opening the keyboard with symbols) and, without lifting your finger from the screen, move to the character you want to insert!

13. Return to the top in any application

We are sure that you have been in such a situation more than once when you scrolled through text or images for a long time in some application, for example, on a website. If you do this all the time, you will be glad to know that scrolling up to return to the header is not at all necessary. Just touch the clock at top line status and you will automatically return to the top.

14. Stop music or video with a timer

If you are used to listening to music or watching your favorite TV series before going to bed, you have certainly discovered more than once in the morning that there is no charge left on your iPhone because you fell asleep and did not turn off the music or video. The standard Clock application has useful opportunity Set a timer to stop music or video playback. Set a timer and select Stop as the alert.

15. Quickly reschedule an alarm

We all love to sleep, and the iPhone makes it very difficult for most of us to do so in the morning. But in order not to oversleep, it is, of course, better not to turn off the alarm clock completely. And, for example, postpone it. This can be done not only by pressing a button on the screen. There is a much simpler way. You just need to press one of the volume buttons. One press and the alarm will immediately stop and be snooze for 9 minutes.

16. Level directly on iPhone

In the standard Compass application, which, of course, few people use, there is an additional “Level” tab. By switching to it, you have at your disposal a full-fledged level that can help, for example, hang a picture evenly. Note that the Compass function has been moved to new application "Roulette" .

17. Hiding private photos

18. Image enhancement

Every iPhone user can greatly improve his photographs if he begins to pay attention to the choice of exposure (). Right in the Camera app, tap iPhone screen, then tap again and while holding your finger on the screen, swipe up or down. You will notice changes instantly - the scene will become lighter or darker. Most often, photos lack light, and with this method you can add light to a photo artificially.

19. Speed ​​up Safari

In Safari settings there is one little-known parameter that speeds up opening a web page. Go to Settings → Safari → Add-ons → Experimental Features and check the Link Preload box. Thanks to this, the speed of mobile surfing will noticeably increase, since data from some sites will be loaded even before clicking.

20. Flash on notifications

A very old, and because of this, forgotten by many users function, which makes iPhone flash blink when there are incoming calls or notifications in silent mode. To enable it, go to Settings → General → Accessibility → Alert Flash and activate the option of the same name.