Can i connect my iphone 6 t-mobile to other carriers?

Can my iphone 6 on t-mobile be connected to any other carrier? If so witch ones? Or any?

You can unlock your T-Mobile iPhone 6 and use it on AT&T, StraightTalk, MetroPCS, SimpleMobile, Net10, Family Mobile, Cricket GSM, outside US. If you need help with getting the iPhone 6 unlocked, mail me.

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