iOS 11

Let's say you're using your iPhone's Calculator app, and you're knee-deep into a complicated calculation with many steps. You type in a large number, for example, "123,466,789," but mess up. You meant to type "5" midway through but accidentally typed "6" instead. The only thing to do now is start over, no matter how far along you are, right? Wrong.

Apple likes hiding things in its software, including secret apps, hidden iMessage effects, status bar customization, nameless icons, and red screen mode, but some of its best Easter eggs are right in front of you on the Home Screen.

In recent years, Apple has been pushing health and safety as cornerstones of its technology, and iOS 11 is no exception. Apple's latest entry in its mobile operating system brings a new emergency feature called Emergency SOS, which gives you easy access to contact 911 if you press the sleep/wake button five times. It's a useful way to contact emergency services when you might otherwise not be able to.

Ringtones and text tones can be annoying, so my iPhone is almost always set to vibrate on silent mode. Unfortunately, that causes me to miss phone calls and text messages when the device isn't in my hands or pockets. While I hate missing alerts, I'm still reluctant to switch to ring mode — and that's where another iOS and iPadOS feature helps out.

There's a feature hiding in your iPhone's Mail app you may have missed but should definitely know about. It gives you quick access to something you'd typically have to dig around in folders to find.

There's a whole world of hidden iPhone features you might be missing out on, but this little-known tool for iOS is something you should definitely enable so that it's ready when you need it.

A little-known setting on your iPhone gives you the power to change the color of certain contact names and email addresses when drafting an email. Customizing the color works well for visually separating contacts at a glance, and it can even help you from sending an email to the wrong person.

You can set a GIF as the wallpaper for your iPhone's lock screen, but it won't animate like it does when looking at the image in the Photos app. It's an annoying limitation on iOS, but one that's easily bypassed with a tiny bit of work.

You see it in the movies all the time. A character on the phone doesn't like what the other person is saying or telling them to do, or they just don't want to talk to them anymore, so they fake bad reception and cut the call off. In real life, it's pretty easy to tell when someone is doing it, and there are better ways to end a call abruptly so that it looks like you didn't hang up on them.

Unless you have unlimited cellular data, you probably connect your iPhone to every Wi-Fi network you come across. It could be a local coffee shop, public library, or just a friend's place. Wherever it is, you'll need to ask for the access point's password if it's a secured network, and that can be a hassle if the place is busy or the owner forgets the credentials. Luckily, Apple has a solution for this problem.

Your iPhone keeps track of every single place you go, especially those you frequent most often, and syncs those locations across all your iCloud-connected devices. People who gain access or already have access to your iPhone, iPad, iPod touch, or Mac may be able to view all of these locations to see where you've been and where you might be. If this worries you, there are things you can do.

You take a photo or video, send it to a friend, and they say, "Hey, I can't open this." More often than not, your friend won't be using an iPhone, iPad, iPod touch, or Mac. Instead, they're likely trying to open the file with a non-Apple device. But this problem can be avoided if you know what setting to change.

Amber, emergency, and public safety alerts on an iPhone are loud — startle-you-to-death loud even. They can happen at any time, day or night, and sometimes back to back when you're in a big city. Those blaring sirens can wake you from sleep, interrupt an important meeting, or disrupt an entire movie theater mid-movie, but you can turn most of them off if you're tired of hearing them.

Between sending iMessages, jotting down notes, and crafting emails, you do a lot of typing on your iPhone. No doubt, you've been in the middle of an important task when everything comes to a screeching, obtrusive halt, where a rogue "Undo Typing" pop-up forces you to close it before continuing with your typing. Don't put up with the BS anymore — here's how to stop it.

Since iOS 6, "Respond with Text" has allowed us to quickly respond to a call we can't (or don't want to) answer. But Apple only gives you three options to choose from, and if you don't have time to type out your own response, those three might not cut it. Luckily, you can customize these three replies to whatever you want.

It's almost impossible to use Apple News at night without having to mess with the white point and zoom filters. That might sound a bit dramatic, but it's really not when you consider that iOS 13 has a perfectly good Dark Mode that should work for News. So why are we stuck reading most news stories in Light Mode? We're not, but you have to put a little work into it going dark in News.

You're out and about, and nothing on your iPhone will load. A glance at the settings shows a saved Wi-Fi network with full bars that your iPhone had connected to automatically, but you're not getting any internet. If you've experienced this, you're not alone, and there's something you can do about it. You'll even increase privacy and security on your iPhone in the process.

Apple introduced third-party keyboards back in iOS 8, and swipe-input options like Gboard, SwiftKey, and Swype made typing on an iPhone one-handed much easier. Even better, apps like Word Flow moved the keyboard to the side of the iPhone, so there was less thumb-stretching. Well, ever since iOS 11, Apple has had its own option for better one-handed typing in the stock keyboard.