Sprint iphone 4s for tmobile?

I bought a sprin and I looked up if I can use a sprint and unlock it for tmobile and majority said no because sprint didn't have a sim card slot or something but I restored the phone and it does have a sim card slot. All I have to do is get my tmobile sim card. Will I be able to use it?

You right, the Sprint version ot the iPhone 4S supports GSM and CDMA network, meaning that the handset offers SIM card slot. However, the phone will need to be unlocked first by Sprint in order to be compatible with any other GSM carrier, such as T-Mobile.

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