For OnePlus users, it is usually issues with the fingerprint sensor that seems to be bugging quite a few users. As a result of which, they are unable to register or enroll their fingerprint or use the already registered ones to unlock their device. So right before you step into the modding domain, your first course of action should be to take a backup of the persist partition. In case you end up messing with the fingerprint, then you could easily fix it by restoring the backed up persist. On that note, let’s get started with the steps to take a backup of the persist partition.
How to Take a Backup of Persist Partition
The below instructions are listed under separate sections for ease of understanding. Make sure to follow the same sequence as mentioned. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.
STEP 1: Root your Device
First and foremost, your device needs to be rooted. If you haven’t done so, then you may refer to our guide on How to Root Android via Magisk Patched Boot.img.
STEP 2: Install Android SDK
First and foremost, you will have to install the Android SDK Platform Tools on your PC. This is the official ADB and Fastboot binary provided by Google and is the only recommended one. So download it and then extract it to any convenient location on your PC. Doing so will give you the platform-tools folder, which will be used throughout this guide.
STEP 3: Enable USB Debugging
Next up, you will have to enable USB Debugging so that your device is recognizable by the PC in ADB mode. This will then allow you to execute the ADB Shell and henceforth the su command. So head over to Settings > About Phone > Tap on Build Number 7 times > Go back to Settings > System > Advanced > Developer Options > Enable USB Debugging.
STEP 4: Grant SuperUser Request
STEP 5: Backup Persist Partition via ADB
How to Restore Persist Partition
So you have messed up the fingerprint on your device? Well, not an issue as you could easily fix it just by flashing the backed-up persist.img file. So these were the steps to take a backup of the persist partition on your Android device. If you hadn’t taken the persist backup beforehand and your device is currently facing fingerprint issues, then there’s no point in taking the backup of the persist partition and flashing it. This is because the said partition has already been corrupted. Moreover, you cannot use the persist partition image from another user, even if they have the same device and belong to the same region.
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