<br><br>Factors to consider to avoid triggering anti-rollback on FP4:
<br>
<br>* Rollback index is UPDATED to ro.build.version.security_patch value, provided the bootloader is LOCKED.
<br>*Rollback index is NOT dependant on android Version.
<br>*Rollback index can NEVER be DOWNGRADED.
<br>*Rollback protection errors happen when you have a build LESSER than the rollback index stored on the device.
<br>* Rollback protection errors are FATAL when LOCKED.
<br>* Rollback protection errors are IGNORED when the bootloader is UNLOCKED.
<br>* Rollback protection errors trigger if you install an update whose version number is `LESS` than the rollback index's value stored on device.
<br>*The value of rollback index is `UPDATED` to match `ro.build.version.security_patch`'s value of the currently installed version, but only if the bootloader is `LOCKED`.
<br>*The value of rollback index is `NOT` dependent on the currently installed `ANDROID VERSION`.
<br>*The value of rollback index can `NEVER` be `DOWNGRADED`.
<br>* Rollback protection errors are `FATAL` when the bootloader is `LOCKED`.
<br>* Rollback protection errors are `IGNORED` when the bootloader is `UNLOCKED`.
<br>
<br>
Click the `Details` section to view some examples<br>
