Welcome to our Support Community! It's a bummer that we're meeting on these terms but I understand that coverage in the two places you spend most of your time is a must. I'm sorry the coverage in your area hasn't improved when a store representative told you otherwise. Have you talked with our Tech Support folks about this yet? They'd be able to see if future enhancements are actually on the way and if/when the new towers will be online. To answer your question - no, the devices cannot be returned for a credit if the account is being canceled or a trade-in towards an upgrade is happening. My best piece of advice for the devices would be to look at selling them.
I have posted a tweet a week ago for a coverage disruption. The location is north georgia premium outlets, which is obviously not a deserted place. Its a an outdoor shopping area with hundreds of branded stores. I could not find signal , make or receive calls at all. there was absolutely no signal whatsoever. Whats the fiing point in switching from ATT to T-Mobile, just to save billing $$s. I really like T Mobile but the coverage is inferior to say the least. who can assist me ? I can take a local T mobile rep along with me there to show and prove my point !!