Android Rooting Forum discussion about general android root development.
If you root a phone or tablet, does that void the warranty? If so, why? Exactly how does rooting change the phone/tablet? What are the odds damage could be done during rooting?
Usually yes. However, on most phones you can 'unroot', so if you have a problem (and can still access your phone of course) then you can unroot it before sending it back.
Rooting essentially involves using an exploit to gain access to system filled on the device, which is something manufacturers do not want you to do. Hence the cancelled warranty. Rooting is usually a safe process, provided you know what you're doing and more importantly, provided you know exactly what you want top achieve by gaining root access. Damage caused during the course of routing usually does not go beyond a soft brick which can be fixed by flashing a stock firmware image. In rare cases though, it could also result in a hard brick, read expensive paper weight But like I said, these are rare cases. It's a completely reversible process though, and you can always unroot and flash back to stock before sending in your device to the manufacturer/carrier for repairs covered under warranty