Cellular stuck at 3G only
I got LTE network but it got stuck at 3G only. Already restarted my phone, put on airplane mode, take out my sim card and put it back, and also disable sim pin but it still won't connect to LTE network. This problem had occurred twice within this week and today it happened again. The only solution I knew to make the connection became LTE is by factory resetting my phone. I don't want to keep resetting my phone because I got a lot of important stuff in my phone. So I need another solution to solve this problem. Got any ideas?
iPhone 5