How to fix 4lte or data on any rom ? Read this .....
Disclaimer: what ever you do to your phone is on you! me or nobody will be responsible if your phone get mess up or die... it will be up to you !!!!!!!!!!!!!!!!!
This only work if your Data profile is missing which is why you lost data otherwise its something else that broke it.
To be on stock.
The msl password.
Copy the Data profile down
or the whole thing... in case you rom in missing more information which the phone need to communicate to the service. Since some rom cant read data profile you need to reprogram the phone you seft.Just put the data profile info back in and enable lte.
Note: if something is missing just add it back in.
1_Flash your rom and dial ##3282#
2_ In the "edit" program put your msl password
3_add your phone info. back in
4_ restart your phone
5_ in setting / update/ update profile.... just update the profile and you are good to go.
If you want the msl password root your phone and download get my msl at the android market then try to put a ramdom msl password then go back to the msl app the try it again
Dont forget to thank.
Sent from my SPH-L900 using xda app-developers app