I do not believe that Band 30 has been activated everywhere yet, I actually sold my first Oneplus 3 because of poor cell signal and missed / dropped calls. I had the same problem using an AT&T branded Galaxy Note 5, every time I was having cell problems I would look and sure enough I was on Band 30. AT&T was no help, they just keep replacing my SIM card. I have been thinking about getting a 3T now that I sold my Note 5 but still leary about running into the same problem. AT&T should have some way of switching bands when your phone is sitting there on - 119 or practically no signal. I still never understood what the purpose of them (AT&T) implementing band 30 was for anyway.