At&t signal keeps disconnecting topic

I have been having this annoying problem were my signal keeps disconnecting and reconnecting. I've notice that it mostly happens when I goes from 4G to 4G Lte and vise versa. Have not found any solutions to it. So far I've done
Flashed a different rom
Flashed modems
Downgrade from 4.4.4 to 4.4.2 (NC1)
ReEnterd APN setting
Gone through pages on google
Blamed the people on XDA [emoji13] hehe!
Anyone knows anything about this problem?
Thank you
Currently on At&t NC1