Hi, need help.I was on CherishOS 3.9, here's my step as below.
1. MSM tool back to OOS 11 update to OOS 12.1 C33
2. Have an unlocked bootloader
2. Download copy_partitions, vbmeta, recovery, and rom for your device from link
3. Reboot to bootloader
4. fastboot flash recovery recovery.img
- fastboot flash vbmeta vbmeta.img
- fastboot reboot recovery
5. While in recovery, navigate to Apply update -> Apply from ADB
6. adb sideload copy_partitions.zip
Here came problem, "signature verification failed, install anyway?", 1st time I did install anyway and it showed "code 21"
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then I tried ArrowOS recovery still showed signature issue.
Please help, thnka you
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