G991B 12 U3 Fix Call Recording Solution Easy Flash
Pre Requirements:
a. A Windows PC with internet connection.
b. Odin Patched Here
c. Call Recording Fix Firmware Gbfirmware

Working Instruction and Guide
1. Eject the SIM Card(s)
2. Go to Settings -> Apps -> Calendar -> Storage -> Clear Data.
3. Put your phone into download mode.
4. Run the Odin….exe (downloaded in step b) as administrator
5. Click CSC and select Call Recording Fix Firmware IaasTeam
6. Click “Start”.
7. When phone reboots, Repeat step 2.

All done. You can insert SIM Card(s) and use Call Recording.

Notes:

You’ll be on different region’s CSC after this.
Phone will not factory reset and you won’t lose any data after this.
You might not be able to get system updates after this.
In order to get them you’d have to flash your region’s CSC, then update, then flash Call Fix File again.

Gbfirmware is not resoponsible for brick, loss or any damage to your phone. So backup 1st

File link