This should be a standard feature in Android 14 —
Mailing in your phone for repair? Samsung has just the feature for that.
Samsung is introducing an interesting new feature for people sending in their Galaxy phones for repair: “repair mode.” When shipping off your phone, you might want to do something to protect your data, and the new feature sounds like a great solution. It locks down your data, but not your phone.
Handling data during a mail-in repair process is tough. You could wipe your phone, but that’s a big hassle. You don’t want to just send in a completely locked down device, as technicians can’t thoroughly test it if they’re locked out of everything. While in repair mode, technicians can still poke around in your device and test everything, but they’ll only see the default apps with blank data. When you get your device back, you can re-authenticate and disable repair mode and you’ll get all your data back.
The feature was first spotted by SamMobile, and Samsung has so far only announced the feature in a Korean press release; it is first launching in Korea for the Galaxy S21 (the S22 is Samsung’s latest flagship phone). Repair mode can be turned on from the settings menu, and Samsung says (through Google translate), “You won’t be able to access your personal data, such as photos, messages, and accounts,” and anyone with the phone will “only use the default installed apps.” Repair mode can be exited the same way, though you’ll need to authenticate with a pattern, pin, or fingerprint.
Samsung doesn’t explain how the feature works, but Android has a number of built-in capabilities that would make it relatively simple to implement such a feature. Android supports multiple user accounts, which allow for multiple separate sets of apps and data. It wouldn’t take much to lock down the primary user and spin up a “guest” user with no data for the repair people to work with. It’s also possible that Samsung is locking down the entire user data partition. Repair technicians could get a temporary data store and access to the read-only system partition, which houses all the OS files you would need for testing.
However the feature works, it’s a great idea, and it’s something we’d like to see other manufacturers implement. For now, repair mode is only available on one model of device and only in Korea, but Samsung says it will get a wider rollout in the future.