We are both on T-mobile. My wife's is an unlocked AT&T 6+, and I have a new (well, month-old) 7+ from T-mobile. I don't make a ton of calls, but I have been talking a lot the past couple of days. People often tell me I keep cutting in and out. Thinking back, it did this even on the day I got the phone. I thought the 7+ was supposed to have band 12 which made the reception better on T-Mobile. We live about 15 miles south of Dallas. My bars inside the home (where most of the time people have said I cut in and out) are about 1-3 most of the time. I called T-mobile tech support today, and they claim that the tower closest to us is "being modernized," and that is most likely the reason. He said the work should be completed in a few days, so in a week, reset my network connections on the phone. Does this seem right? I wondered if it's my Otterbox Defender case, but the tech support rep said he doesn't believe it's the case from the way I was sounding. My wife has a very similar-looking case from Tech 21. Still doesn't make sense to me that my wife's older, AT&T unlocked is getting better reception. Any ideas? Thanks!