I unlocked my HTC Inspire 4G from AT&T, but it's not recognizing the network on the pay-as-you-go SIM I bought from the 3 network in the UK. Went in to a 3 store, and they verified that the SIM works in another phone. Contacted AT&T, and their "specialized team" took a few days to get back to me, just sending me the unlock code again... I tried a factory reset but that hasn't fixed the problem. Any ideas?