Spotted these very useful yet hidden iPhone features on the internet. Enjoy!
Make TouchID work faster: The iPhone 6s comes with a newer version of TouchID which is 2x faster but on older phones such as iPhone 6 and iPhone 5s there is a trick to get the same effect. Simply, save the same thumb fingerprint multiple times as different entries and TouchID will work much faster. (you can add as many as five entries)
Redial: In the Phone app, press the green call button on the keypad screen to make the last dialed number appear.
Clear cache: There’s a simple trick to make your phone run faster by clearing out the cache. In the App Store, Podcasts, Music, Game Center and Phone apps, tap on any single tab icon at the bottom of the screen 10 times in a row.
Spotlight conversions and math: You can use Spotlight search for currency or metric conversions like “20 USD in Euros” or “54 inches in feet” and it will instantly perform the conversion. Same goes for any type of math problem. No need to open the Calculator, just pull down to open Spotlight and type it right there.
Clear memory: Clearing out the ram will help you speed up your phone. Hold down the power button until you see “Slide to power off,” then let go and hold down the home button until the screen goes blank and your home screen reappears.
Delete numbers in Calculator: Speaking of the Calculator, you can delete single digits when you tap the wrong number by swiping left or right on the screen where the numbers appear.
Remote shutter: Use the volume up or down button on your headphones to snap a photo in the Camera app.
3D Touch while drawing: All of the drawing tools and the eraser are pressure sensitive in the Notes app.
Close multiple apps at once: Double-tap the home button to open the app switcher and you can use two, even three fingers to slide multiple apps closed with one swipe.
Recently closed tabs: Want to reread this article on your phone but you forgot what site you were reading it on in the first place? Simply tap and hold on the + symbol in Safari on the tab carousel view to open a screen that lists all of your recently closed tabs.
Desktop version of a site: To request the desktop version of a mobile site in Safari, simply hold down the reload button in the URL bar.
Peek at tabs and bookmarks: Not sure you want to open that tab in the Safari tab carousel? A 3D Touch will let you Peek at it first. The same can be done with bookmarks.
Edit reminders: 3D Touch an item in your Reminders app to edit the time or add a location.
View only unread emails: Tap the Mailboxes link in the top right corner of the Mail app and then tap Edit. Tap the circle next to “Unread” and you’ll have a new folder that contains only your unread emails.
Save a draft in Mail: In the Mail app, tap on the subject line and swipe down to the bottom of the screen to save a draft.
Quick Reply: When you get a notification at the top of the screen that you have a new iMessage or SMS, pull the notification downward to reply without leaving the screen you’re on.
Re-enable Low Power Mode: When Low Power Mode automatically shuts off as you charge, you’ll get a notification on your lock screen that it has been disabled. Swipe left on that notification to turn it back on.
Find an iPhone’s owner: Simply ask Siri, “whose phone is this?” and it will show you so you can get in touch with him or her and return it. This is fairly useful if you find a lost iPhone or if you want to check whether Siri recognises you as the owner on your own iPhone.
Reachability: Double-touch (don’t tap, just touch) on the home button and the entire screen will shift down so you can reach the top without shifting your grip. If you want to turn it off, simply go to Settings > General > Accessibility and look for Reachability and disable it.
Make Siri remember your spouse/parents: Ask Siri, “Call my wife” or “Call my father” and Siri will ask you to register a particular contact in context to their relation with you. This is helpful whenever you want Siri to send a text or call your wife or mother/father.
Speak Screen: This is a secret weapon in iOS that only few people know about. This would allow you to listen to any kind of text on the screen and while it’s hidden under the “Accessibility” settings, it’s actually pretty useful for normal day use. To enable, go to Settings > Accessibility > Speech and enable Speak Selection. Also, make sure to select Alex in the Voices > English section to get high quality English voice that delivers natural sounding speech.