The term "jailbreaking" in iPhone terminology refers to the altering of the phone's firmware to allow third-party applications and custom editing. Meaning, it gives you full functionality over your iPhone and allows you to do things that Apple does not technically allow. If you have attempted to jailbreak your iPhone 3G, or if you have purchased a used iPhone 3G and wonder if it may already be jailbroken, just look for the telltale signs to know for sure.
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See if the "Installer" app is visible on the home screen. It would appear as a blue icon with the word "Installer" written beneath. Installer allows you to access third party apps and always indicates a jailbroken iPhone. Other third-party installer apps include "Cydia" and "Icy," both of which indicate that your iPhone is jailbroken.
Look for any irregularities on your iPhone. Your background should always appear black, your apps should all appear the same size and you should not see any text on your home screen except for the app names, the current time, your available Internet connection and the word "AT&T." If your screen looks any different, you have a jailbroken iPhone.
Check for any unusual apps and search for them in the Apple app store. Aside from the standard Apple apps on the first page of your screen, such as "Maps," "Stocks" and "Calculator," every app should be available in the app store. If your iPhone contains any apps of unknown origin, then you probably have a jailbroken device. Apple only authorises app downloads from the app store.
Attempt to install apps from websites other than the Apple app store. If you have attempted to jailbreak the iPhone yourself and want to test the success of your endeavour, you can know for sure by trying this method.
Tips and warnings
- Jailbreaking your iPhone is illegal according to Apple and will immediately void the warranty on your phone. Jailbreaking may also leave your iPhone vulnerable to malware and can ultimately cause it to stop working altogether.
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