My s4 is rooted. The problem is that after some flashing of custom roms my 4g/3g is not working properly . In other words, in all roms above jellybean ( kitkat and lollipop) my LTE and 3G is working only for 1-2 minutes and then my signal drops to zero no signal at all. When i switch to GSM signal comes imidiatelly to full! I have searched a lot in this forum , I have tried many times to change modem , CSC using ODIN ofc, but no succeess so far.. I dont know what else to try or to do differently...I also tried to flash the stock modem but still no success... I would like to add that in 90% of roms that i have tried so far my WIFI , and everything else is working normally ... My only issue is what i had mentioned before...PLZ help me.. I DONT KNOW WHERE TO REFER TO IN THIS SITE...
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