I recently bought a tmobile prepaid phone to check service in my area. Can I use the same phone and upgrade to the One plus plan? Its a galaxy on5.
You can use any T-Mobile phone with any T-Mobile plan.
You may be required to buy a new SIM card when moving from prepaid to postpaid (or vice-versa).
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Manage your T-Mobile account
Use the T-Mobile App or your My T-Mobile account
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