Swipe down from the center of the home screen to open the search bar. [1] X Research source Type cydia into the search bar. Tap the Search key on the keyboard. If an app called “Cydia” appears in the search results, your iPhone is jailbroken. [2] X Research source To unjailbreak your iPhone, see Unjailbreak an iPhone.
Never click a link in a pop-up ad. This could result in further infections. [3] X Research source
Update the apps on your iPhone regularly so you’re always using the most secure versions. [4] X Research source
Swipe through your home screens and folders to check for apps you don’t recognize or don’t remember installing. If you see an app that looks familiar but you don’t recall installing it, it could be malicious. It’s best to delete it if you don’t know what it is. To see a list of every app you’ve installed from the App Store, tap the Apps icon at the bottom of the store, tap your profile photo, then tap Purchased. [5] X Research source If there’s an app on your phone that isn’t in this list (and doesn’t come from Apple), it’s likely malicious.
To check your battery usage, see Checking Battery Usage. This teaches you how to find which apps are using the most battery power. If you see an app you don’t recognize, remove it immediately.
