OnePlus OTA keep Root and TWRP

As the title suggest to keep Root and TWRP with OTA update

Download oxygen updater

Download full stable build on your OnePlus phone version

Once downloaded go to your setting and system update

Select local upgrade, wait til the update finishes but DO NOT RESTART

Once the update reaches to 100% go to Magisk

Magisk Module install TWRP A/B Retention script again DO NOT REBOOT

Go to Magisk 1st page select Magisk install

Select install to inactive slot (after ota)

Watch magisk load and NOW YOU CAN REBOOT

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