I recently purchased a OnePlus 3t (new, unlocked). I've never bought an unlocked phone and used on t-mobile before. What is the procedure exactly? I have an HTC One M8 on my t-mobile account. Is the proceedure that I need to take the simcard from my HTC and put it in the Oneplus and then just turn it on and that's it? Or do I need to take it into a t-mobile store?
What do I need to do exactly?
Congrats on your new phone jakobud.
This is a very good question and it's awesome you came here to ask it. There are some APN settings you'll need to have for sure. They'll help you take advantage of our data connection and MMS services. You should stop by our Bring your own device setup guide page if you haven't already. It's got some really helpful info you'll want to look at that relates to using this device with us.
Manage your T-Mobile account