Can you tell me more about it? I have 3.0 now but not noticing so much bugs. Battery life is fine.No because 3.0 is buggy as hell.
And if you need to jailbreak/unlock it can easily be done with blackra1n on 3.1.2.
I have tethering now but I never use it lol. I don't know why.keep 3.0, that way you can allow tethering without having to jailbreak !