I was able to unlock my phone's bootloader and tried installing a twrp. Unfortunately, after flashing TWRP which didn't work. I deleted system using fastboot with instructions from installing gsi images without twrp. After deleting system, I tried flashing the gsi image using fastboot which didn't work of course.
After different trials to get back to stock recovery, I was greeted with PitchBlack Recovery Project and I tried mounting the all file systems and partitions that I could mount (everything worked expect USB/OTG). Then proceeded to Wipe > Selected Dalvic, System, Cache and Internal Memory > Swipe to Wipe.
I proceeded to flashing the system image (which was successful). Rebooted to recovery and then rebooted to system. But I was always rebooted back to PitchBlack Recovery. This has been outcome even with AOSP android 10.
Tecno Camon 11 (Tecno_CFK) supports project treble with arm architecture and partition A (meaning it does not support seamless updates). All my gsi files are correct and install properly (with no error messages) but when I reboot to system, I get returned to recovery. Please help (Sorry for the long story)...
Thanks in anticipated quick reply.