I had really high hopes about T mobile. Grabbed a SIM today to test the network. In my iPhone 6s I get LTE all over my house even the basement. Speedtests download of about 10 Mbps on the 1st two floors with my basement at 3 Mbps. Outside I'm at 15 Mbps. Overall a drop from the performance I get with ATT. Pop the sim in my wife's iPhone 6 and my LTE coverage is abysmal. I got one bar on the ground floor; rest of the house is 4g with barely any signal in the basement. Speedtest on 4g is about 2.5 down. So definitely band 12 that the iPhone 6s has is making a huge difference. So I would need to upgrade 4 phones to get the band 12 functionality. Tomorrow I test at work. I can live with using wifi at home; however at work I need LTE.

Fdw