Quote:
Originally Posted by demolasko
i would say no becasue the voice calls route thru the ESN not the sim part unless roaming internationally
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Well, it is possible to use the SIM slot with a US SIM on a US GSM carrier after you unlock and flash the proper radio.
After flashing the radio in this thread:
http://forum.xda-developers.com/show....php?p=4850772
I am able to switch my phone over to ATT's GSM network and make and receive calls without any probs. So I know this phone works on US GSM bands with an ATT sim card after unlocking and flashing, but the data tries to initiate through the ATT service as well.