Hey gang Bought an iPhone 6+ from tmobile.com. Just set it up and noticing dead pixel mid-screen. In the past, I've bought AT&T phone right at the Apple store, and with pixel problems in the past, just brought the phone into Apple for an exchange. Can I bring the iPHone I bought through Tmobile to an Apple store then for a similar exchange, or do I have to go through Tmobile you think? thanks!