Can you use a T-Mobile prepaid sim card on an unlocked AT&T phone?

you can your yout tmobile sim card all day in any unlocked phone
downsides of it remember only if the phone is unlocked
internet settings are set to att so you would have to change them

GariteS4261996 said:

I want to get their $15 a month plan, but I'm not sure I like their phones. Can I put the T_Mobile pre-paid sim card in the unlocked phone?

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Hi once you unlocked your phone you can put any other sim card in your mobile. If you want unlock your at&t phone you can visit this site Theunlockarena.com here you can get the code and unlock your mobile. After unlock your mobile you can put different sim card in your phone.