The same goes for high battery usage, which you can also check in the Settings app-just head back to the main Settings menu, select 'Battery,' and scroll down to see which apps have used the most battery power. If you have a virus or malware infection, you'll often see high data usage from apps you don't recall using. Another thing to look at is which apps on your iPhone are using your mobile data-open the Settings app, select 'Cellular,' and then scroll down to the 'Cellular Data' section. You may also have an infection if you're suddenly seeing lots of pop-up ads, warnings you've never seen, or demands for payment for your own data. If you're not sure whether your iPhone is jailbroken, swipe left across the home screen until you reach the App Library, tap 'App Library' at the top, and search for common jailbreak apps like Cydia, unc0ver (that's with a zero in place of the letter O), Checkra1n (that's a 1 in place of the I), or TweakMo. Also, if you decided to jailbreak your iPhone to download apps that aren't on Apple's App Store, you have a much higher chance of downloading a virus or malware than you would with a non-jailbroken iPhone. First, do you see icons for apps you don't remember installing? If so, there's a chance you may have accidentally downloaded some malware, or that somebody has access to your iPhone. If you're worried there may be a virus or other malware on your iPhone, there are a few things to look for.

Apple virus scan