If you want your device's status to read "official",
1. Root your device (I prefer Chainfire autoroot)
2.a) Run triangle away, reset your bin (flash) counter. Now your bootloader will say 0 counts.
2.b) As for the device status (in about device), there's a button just under "reset" in triangle away application, tap it and reboot. Your device status will now be "official"
3. (Optional) Go to your Superuser application, tap cleanup and unroot (if available)
Now you're unrooted, and running official firmware. You can use OTA anytime.
Samsung Galaxy Mini 2 [GT-S6500D] : Android 4.2.2 on TheWhisp's CM10.1
Samsung Galaxy Tab 2 [GT-P3113] : Android 4.2.2 on stock Samsung ROM.