Jailbreaking has always been a little taboo. For a long time no one was sure if it was illegal or not, whether it damaged your phone, infected with viruses or bricked it. Until you actually do it, there’s no real way to find out. (The name doesn’t help that much.) Only in the past couple of years has it become officially legal in the States. It’s been legal in many countries since its inception, except most of us didn’t know it. (I only found out last year that it’s legal in the UK.) One thing that’s always been sure: Apple doesn’t like it, and it can void your warranty.
“Apple strongly cautions against installing any software that hacks the iOS. It is also important to note that unauthorized modification of the iOS is a violation of the iPhone end-user license agreement and because of this, Apple may deny service for an iPhone, iPad, or iPod touch that has installed any unauthorized software.”
But now, there’s a saviour: SquareTrade. From around $60 your iPhone is covered no matter what state the software is in. (For UK residents, it’s £99.) You could be running every tweak in Cydia, and your phone will still be replaced, or fixed if it develops a fault or gets damaged. There is one main exclusion: hardware alterations are not allowed. No tinkering under the hood.