How to unlock an iphone 3gs when it's sim locked and the lock button doesn't work???

Question

I bought this iphone 3gs off an app. I just want to use it as an ipod. it is sim locked (with two attempts left) and the lock button doesn't work at all. What can I do? I just want to use it as an ipod.
I have also tried everything. I took the sim card out and put it back in again. And I have also left it out. And I have tried connecting it to itunes but I need to unlock. (some of these were suggested by the seller)
Please help me.
im

Answer 1

My guess - and this is completely a guess - is that the SIM in that phone has a PIN that was added to it by the previous owner. Whomever you bought it from didn't bother to check for this (or didn't care) before they got it from the previous owner.
You need to get a new AT&T SIM for that phone - you could even borrow one from a friend if they have one that will fit the phone. You would only need the SIM to activate it.
There is no way to activate an iPhone without a SIM in it, even if you don't plan to use it as anything other than an iPod.
~Lyssa