Random: but one of my friends and I went to see Rogue one, he has T-Mobile (major fanboy) and constantly talks down about sprint. Well we were in theater and he had no service and I had 3 bars of LTE lol
I honestly can't remember when my phone said "no service" or "extended".
Of course each market is different but I was pretty shocked that he didn't have service at all since T-Mobile is fairly good in the D.C. Metro area.