Att galaxy s4 and had the same problem that was fixed by editing the build.prop . I am helping him over the phone and he cant find the line that needs to be edited . Are the build.prop for Tmobile gs4 and att gs4 similar? And are there any other fixes for this issue. I am going to suggest he wipes data and dalvik and cache . I just need to know if there any other solutions just in case these don't work.. So far this is all I could find..
Thanks in advance