The reason why it says wrong card is because your phone is locked with T-Mobile SIM card and you're using a different SIM card which is not authorized by T-Mobile. Call T-Mobile and ask for network control key or NCK code. Once you have it try this command string to unlock your phone. #7465625*638*NCK#
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.