iPhone 3GS Newbie - Jailbreak & Unlock
This is my first Apple product ever. I would like to jailbreak & unlock my phone so I can use it on Orange UK simcard. It's running 3.0 software and I have Itunes running on my Windows machine.
The question is how do I stop/disable the phone from upgrading to software version 3.1 etc as I have read on DevTeam that you may not be able to jailbreak/unlock EVER again if you do this? Is there an option in Itunes to disable the software upgrade facility?
Also, how will I be able to install applications, i.e. can I use Itunes even after the unlock/jailbreak?
Lastly, I read on Dev Team that you need to back up some files before you unlock/jailbreak..are these essential/recommended to back up?
Any help much appreciated.