iPhone help?

[T_Batt23]

I've just recently bought an iPhone 3gs from a friend of mine who had AT&T and I have T-Mobile. I inserted my sim card and it says I need a pin unlock. Help please.

 

[iCrank]

I've just recently bought an iPhone 3gs from a friend of mine who had AT&T and I have T-Mobile. I inserted my sim card and it says I need a pin unlock. Help please.

yeah you need to unlock the device