If i have At&t, and a T-Mobile phone, will the simcard work in the T-Mobile...

Justin said:

...phone, i hear it will. Can youhelp? I own a At&t sim card. and my friend wants to sell me a tmobile cell phone, and says the simcard will fit under the baterry and work, as an at&t cell phone. will it work?

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The sim card fitting is not matter,you need to get the phone unlock from network lock.Then only you can use your AT&T sim card in T-mobile phone.To unlock it use unlock code.Visit the site Unlock-zone.com get unlock code and unlock it from service provider lock.Then use AT&T sim card in the unlocked phone.