Help Easy Tether not working on 4G but just fine on 3G?

[golfprowanabe]

This just started yesterday. All of the sudden I couldn't get connection using Easy Tether. Today I'm getting connection but it keeps dropping. Once I pushed it back down to 3G, I get no problems.
I hadn't had a problem with this before. 4G has been working flawlessly before. Has anyone else had any problems recently, or know a remedy?