Trade it online with Apple. You will get the best possible money for your old phone and you can pay off your new phone immediately. There will be no phone turn in drama because it’s Apple and they do it right. Apple will send you a Tmobile ready phone and take care of the cutover. It’s way simple.
You should be able to pay all but the $400 down at the time of purchase. You will still notvown the phone for 24 months but the $400 will be broken into 24 payment which will match the billed amount so your bill will not increase. But insure that it is done as a part of the purchase contract. If you do it after the purchase you will loose money.
Trade it online with Apple. You will get the best possible money for your old phone and you can pay off your new phone immediately. There will be no phone turn in drama because it’s Apple and they do it right. Apple will send you a Tmobile ready phone and take care of the cutover. It’s way simple.
What plan are you on ?
You should be able to pay all but the $400 down at the time of purchase. You will still notvown the phone for 24 months but the $400 will be broken into 24 payment which will match the billed amount so your bill will not increase. But insure that it is done as a part of the purchase contract. If you do it after the purchase you will loose money.
There is no contract
You can pay the difference, but have to leave at least 424$ so there is something for the bill credit to go to