This is not included in stock firmware, reinforcing the importance of backing up this partition. It is important to backup this partition when you get the chance, as people in other threads attribute the loss of the IMEI to this partition. Pds: This partition likely contains important device specific data like the IMEI, Serial Number, etc. Maybe ‘fsg’ and ‘modem’ are related to the modemst1 and modemst2 partitions? This partition is flashed as part of the stock firmware flash procedure, so it likely contains non-unique data (but ensure to get firmware for the right region). This partitions is region, not device, specific. These files store store settings that allow the device to communicate with cell towers, such as the frequencies.

This partition is flashed as part of the stock firmware flash procedure, so it also is likely not unique (again ensure to get firmware for the right region).įsg: This partition also contains files related to the modem firmware/baseband. Modem: The modem partition contains modem/baseband related files. Interestingly, they are erased when flashing a stock rom, meaning they are probably not crucial, possibly some kind of ‘baseband cache’?

Modemst1 and modemst2: These partitions appear to contain non-essentials/temporary network related data. Now lets discuss and fix this issue once for all.įound some important information about our issue: Now tried to flash custom 8.1 still no imei. Tried to flash stock again and lost imei again. flashed some back up found on some form thought may b it will resolve the issue. so I though I should try that may be I will get imei back on stock. I had already taken back up of my stock rom previously. then i installed stock rom with fastboot mode and lost my imei. I installed custom rom 8.1 with twrp 64 bits and it was working fine. Some Important info about Imei 0, No 4G, imei not back after flashing 8.1 rom.

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