LTE not working e980 topic

I rooted my phone to fix an in-call problem that I never found the solution. I tried a bunch of different things that had my restocking my rom over 10 times. got tired of trying so I left it as it was. I ran out of data on my cricket wireless but now its a new month and it seems like im only getting 4G signals and not LTE . its been few days and nothing . im frustrated with this phone ,nothing but problems since I got it and need help getting my 4G LTE up and running .please need help .I need a fix for this problem