I recently bought an unlocked iPhone (1.0.2) and want to change ringtones and maybe add some 3rd party apps. I am a bit confused with how to/what to find and use an app that allows me to do this. I’ve searched several boards but looks like there is a plethora of applications to do this. I contacted the seller of my iPhone and he said he used iBrickr to unlock my phone. I could not find anywhere a “basic” guide for a noob to easily get access to the phone. Also, is it safe now to use iTunes 7.4? Is there any added benefit?