The bootloader must be unlocked before you can flash modified partitions onto your phone.
This is the gold standard for rooting in 2021. You use Magisk Manager to patch your device’s stock boot image, which is then flashed via a PC. Where to Find KingRoot (If You Still Want to Try) kingroot android 81 0 apk download 2021
You extract the boot.img file from your phone's specific stock firmware, transfer it to your phone, and patch it using the Magisk Manager app. The bootloader must be unlocked before you can