Option 01
Connect tab to Samsung kies and try to update firmware
More info,
http://www.samsung.com/us/support/faq/FAQ00052704/61332
if your system running with latest base-band
Option 2
* Connect your device to your computer. Open the Samsung Kies software on your computer and click on the Backup/Restore tab.
* The backup process will begin backing up your personal data.
* Once it’s finished, click the Complete button.
* On your Samsung device, go to Apps, then Settings, then tap Backup and Reset.
* Tap Factory Data Reset and follow the prompts.
* After the reset, open Samsung Kies and click on Backup/Restore.
* Click the Restore button and select which files you would like restored to your device.
Click Complete when you’re done.