I have an iPhone, which has been jailbroken and unlocked with the use of the ultrasn0w. Now I have recently noticed that when speaking to someone my voice is really crackly on their side, so will be restoring this.
Now I'm uninstalling everything off the phone, but now I will update this to the latest firmware and unlock it via the 02 website? Is there any disadvantage to this? can I still jailbreak it after? or shall I just unlock it using blackrain?