Default [Q] Note 3 randomly losing signal?

My Note 3 is rooted on MJ5. Its been working good for a while when all of a sudden maybe once or twice a day it would lose signal in an area with good reception. I either have to wait more than 10 mins for it to go back to normal or reboot my phone. It happened again earlier today, but it froze on the att logo on bootup. Then it did this bootloop thing a few times until finally it was able to get past the logo. Whats going on?