[Q] Firmware downgrade
I wanted to downgrade the firmware on my galaxy S4 I9500 from BMG9 to BMG1 for the battery life because even when I bought a new original battery from Samsung still the drain is high but the phone doesn't get hot as before. When I install the older firmware, the phone loses the mobile network signal and doesn't connect even if I choose the network manually so I have to reinstall the BMG9 again for it to work, can anybody help me with this situation? Thanks
I found a solution through flashing the MG1 firmware with MG9 modem through odin but will this work as MG1 or the modem is controlling all the battery drainage and cell signal. I also believe that the problem came from a faulty imei?? Also noticed that the drainage is still a bit high.