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Jailbreaking Is Legal
If you did not already know, the Copyright Office has ruled that bypassing a manufacturer's protection mechanism DOES NOT violate federal copyright laws. What does the ruling mean to iPhone and Android users? It means that jailbreaking or rooting your phones is legal!
Unlocking phones and ripping DVDs for 'educational' purposes are legal too. Oh, before you run off to jailbreak or root your device, keep in mind that it might void the warranty. Read the statement from Apple below:
"As we've said before, the vast majority of customers do not jailbreak their iPhones as this can violate the warranty and can cause the iPhone to become unstable and not work reliably"