What do you mean by flashed? You need to replace the file in vendor/firmware/bcmdhd.cal. if you have a PC you can use adb to do it directly on the phone:
Note: iirc magisk breaks adb root and adb remount so don't use that if possible.
You can try the following, no idea if it works, but maybe worth the shotHi, I want to change Wi-Fi country code, But I can not find /vendor/etc/firmware/bcmdhd.cal in the internal storage or even in the ROM installation file.
What should I do to modify Wi-Fi country code?
You can try the following, no idea if it works, but maybe worth the shot
Install magisk, then install edxposed, then install the wifi region fix module, see if it works.
I am on eXistenZ premium version 7 on my z2, i want to Install TWRP 3.3.1 for to flash lineage 17.1, i try with fastboot, with TWRP apk, with TWRP zip but i am always on TWRP 2.8.7 on my phone, i try many times and it's always the same problème, i have the bootloader unlocked
Can you help me please thank you
If you don't know LineageOS and would like to read about it before installing it you can take a look at the official Website.LineageOS, an open-source Android distribution, is available for several devices,
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What is your-- LineageOS version: Gapps version: Did you-- wipe: restore with titanium backup: reboot after having the issue: Are you using-- a task killer: a non-stock kernel: other modifications: Provide any additional information (observations/frequency of problem/last version it worked on/etc) as needed:
fastboot flash recovery twrp.img