but it is from firmware 10b. You may want to try if it works better than your firmware. In this case, it is better if you make a backup of your current modem firmware, so you can go back to your version. Here I will write instructions to backup your modem, so you can restore it if you need.
Probably some of you know this already and feel like these are old news, but maybe we can build a modem firmware library.
You need root and a way to make an adb connection to your phone. If you cannot use adb, you can always use a terminal emulator on your phone, but this makes it a bit harder to type the commands. Also, this is for people who understand what they are doing. If after reading the tutorial you don't understand what the commands do, please don't try it. Or at least don't make me responsible if your phone bricks. Here we go.
NON NEEDED STEPS: This steps are here to show why this works.
1-Connect to your phone by adb.
2- On the terminal type :
/dev/block/platform/msm_sdcc.1/by-name/modem /firmware vfat ro,context=u:object_r:radio_efs_file:s0,relatime,uid=1000,gid=1000,fmask=0337,dmask=0227,codepage=cp437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro 0 0
1- Connect by adb
2- On the terminal type
On the terminal type:
dd if=/dev/block/platform/msm_sdcc.1/by-name/modem of=/sdcard/modem.img
131072+0 records in 131072+0 records out 67108864 bytes transferred in 29.959 secs (2240023 bytes/sec)
exit exit adb pull /sdcard/modem.img
HOW TO PACK THIS BACKUP FOR FLASH:
1-Download the file: cwm-lgog_e975-europe-10b_modem.zip from http://downloads.codefi.re/houstonn/...E975_E977_E976
2-Open the zip file and replace the existing modem.img with your file
3-Rename the file to something meaningful, like cwm-lgog_e975-europe-10f_modem.zip
After these steps, you should be able to flash any modem, knowing that you can go back to your old version.
You can upload the packed files here, so we can have a library. I will upload the modem from european 10f version here. I tested it and it works correctly, but I won't take any responsibility for what you do with this file.
All this info is obtained from examining the houstonn LGOG modem flasher from team codefire, so all thanks go to them. Thanks.