Unwanted unlock code screen on Samsung Galaxy Note 10.1 This screen has been appearing lately. It appears in a few seconds after I have inserted a SIM card, rebooted the device, and draw the right pattern or inputted the right unlock code. The screenshot of the unwanted code is below.

Model number: GT-N8000.
Android version: 4.1.2 (stock).
This looks like you have a tablet with SIM lock.

You have to unlock your tablet to use another SIM card (or a SIM card from another provider). You have to contact the provider which has sold the tablet for the first time.