I too unlocked my Samsung SGH-T329 through T-mobile before returning to India. When I put a Vodafone SIM, it works fine. When I put an Airtel SIM, it doesn't. When I searched for networks, it was not showing Airtel, Cellone and Aircell.
I got my mobile (T-mobile) unlocked in USA by the same service provider (T-mobile). It doesn't work...
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I got my mobile (T-mobile) unlocked in USA by the same service provider (T-mobile). It doesn't work with Airtel, Cellone. Works only with Vodafone in India. My mobile is Nokia Expressmusic 5310.