My cellular bars are on but no 4g or lte
I was recently in Germany and as soon as i got back to the US my signal only showed the AT&T sign and 5 dots, before i went to Germany it showed that and a LTE or 4G sign, and i can text (some people) and make calls, but no unlimited data, and i don't think its AT&T because my dads phone is working, anyone know the problem.
iPhone 5c, iOS 9.3.3