I had sent my old device iPhone 6 Plus to Tmobile for a trade in credit. The tracking # showed Tmobile warehouse already received it but no credit was issued. I have been contacted customer service so many times and they said they didn't receive the

yes, took me 4 hours with T-force and 3 different representatives but they finally got me fixed!

The problem was that a lot of customers got sent the wrong label for their trade and sent their phones to the wrong warehouse. (sending to returns lcoation not trade in location)