Whenever I get in a 3G area rather than a LTE area I won't have any data until I reset my APN settings to default and then 3G will pop up, I'm just wondering why I have to keep resetting that Everytime I'm in a low service area.
Check with your carrier - some of them haven't put any 4G in some areas yet, and the phone may not be switching to 3G automatically. Bring the phone to them and let them check it out.