Samsung SM-T520 Service Manual page 14

Level 1 Repair
4. Start downloading the binary files into the device by clicking Start button on the
screen. The green colored "PASS!" sign will appear on the upper-left box if the
binary files have been successfully downloaded into the device.
5. Disconnect the device from the Data cable.
6. Once the device boots up, you can check the version of the binary file or name
by pressing the following code in sequence;
*#1234#
You can perform Factory Reset by Settings → Accounts → Backup and reset
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