Only getting H/H+ On Unlocked Samsung Galaxy A31
Hello, I recently just left T-Mobile and ported my line to AT&T prepaid this morning. Since porting I've only been able to get H & H+ connections. On T-Mobile I would get LTE & LTE+ with no problems. The phone is only 3 weeks old. The model number is SM-4315G/DSL. I've already tried the network reset and no luck.