Samsung unlock code Lock SIM Card message on Samsung A-177

[cyberkid]

I recently got a Samsung a-177 as a gift. I got an unlock code for it and did the unlock for any network. After i typed in the code it said the Network lock was removed, other words the phone was unlocked. Then I tried putting in my T-Mobile SIM card and it asked me for a "Lock SIM Card" number or...

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