i have Samsung Galaxy s4 (At&T) which was rooted before and had no issue. Day before yesterday i wanted to remove root so i watched some youtube video to remove it. i use the following software....
1. AP_I337UCUEMK2_1921628_REV06_user_low_ship_MULTI_C ERT.tar.md5
and after putting in download mode, i did wipe data and after that time my celluar data is not working at all.
I called at&t, told them that is suddenly stop and they tried some diagnostics but no help then they change my sim card but still no help.
my phone info:
Android Version : 4.3
basedband : I337UCUEMK2
kernal : 3.4.0-1921628
Build Number : JSS15J.I337UCUEMK2
BOOT : SAMSUNG
i also tried to update my phone, but during the installation it fails at 28%.
PLEASE HELP ME!!!
Text : MOD EDIT - REMOVED