After exploring different ROMs and mods, there are times when we simply need to return our tablets' original features.  The only way to do that is to reflash the official stock ROM.

In the case of the Samsung Galaxy Ta 2 7.0 GT-P3100, flashing the official and stock Android 4.0.4 Ice Cream Sandwich build DDBLH3 firmware does just that. It gives us back a clean slate that is closer to the original state of the device and also fixes any bugs and missing capabilities. This firmware's region is originally intended for India but it'll work for any GT-P3100.

This guide shows you how to revert the Galaxy Tab 2 7.0 P3100 to Android 4.0.4 ICS build DDBLH3 (stock official firmware).

Warning

• The instructions in this guide are intended for use with the Galaxy Tab 2 7.0, model number GT-P3100. Applying these instructions on another device or model may produce undesired outcomes.
• The information in this guide is provided for instructional and educational purposes only. There is no guarantee that these instructions will work under your specific and unique circumstances.
• Use these instructions at your own risk. We shall not hold any responsibility or liability for whatever happens to you or your device arising from your use of the info in this guide.
• Read and understand the whole guide first before actually performing the instructions.

Requirements

• Samsung Galaxy Tab 2 7.0 GT-P3100
• A Windows PC
• Handset USB drivers installed on the PC. You may install the drivers by installing Samsung Kies.
• Enable USB debugging on your handset.
• Disable antivirus, firewall, and other security software. Also disable Samsung Kies and other software that accesses your phone. Such software can interfere with the procedure in this guide.
• Download the following files to your computer:
  • DDBLH3 firmware update package for Galaxy Tab 2 7.0 (P3100DDBLH3_P3100ODDBLH1_INU.zip, 758.8 MB)
  • Odin 3.04 (Odin3_v3.04.zip, 456.59 kB)
• Make sure your device's battery still has at least 70% power. You don't want the device to shut down in the middle of the procedure.
• Backup all personal data on your phone to make sure you have a copy of your personal data (e.g., contacts, SMS, MMS, Internet settings, Wi-Fi passwords, and the like) in case the procedure in this guide erases such data.
  • For backup tips, check our guides on how to sync your data to the cloud and how to create local backups of your mobile data.

Instructions

1. Extract the P3100DDBLH3_P3100ODDBLH1_INU_HOME.tar.md5 file from the downloaded firmware package.
2. Extract the contents of the Odin ZIP file to your computer.
3. Turn off the tablet and make sure it is disconnected from the PC.
4. Boot into Download Mode. To do so, press and hold the Volume Down and Power buttons. A warning screen will appear. Press the Volume Up key to continue to Download Mode.
5. Double-click Odin3 v3.04.exe to open Odin.
6. Connect the tablet to your PC. You should see a message that says “Added“. If not, there might be a problem with your drivers. Make sure the drivers are installed.
7. Click the PDA button in Odin and select the *.tar.md5 file that you extracted from the firmware package.  Make sure the “Re-partition” option is unchecked in Odin.
8. Click the Start button in Odin to flash the firmware package. Once installation is done, you should see a PASS message. Unplug the tablet once you see the Samsung logo after reboot.
9. In case the the tablet freezes at the Samsung logo while the the tablet is rebooting, do the following the to solve the issue:
   • Turn off the tablet.
   • Boot into Recovery Mode. To do so, press and hold down Power and Volume Up buttons together until the device reboots. When the screen turns on, let go of the Power button but keep holding down the Volume Up button until the device boots into recovery.
   • Select Wipe data/Factory reset and select Yes on next screen.
   • Select Reboot system now to reboot the tablet

Awesome! You now have the official Android 4.0.4 Ice Cream Sandwich build DDBLH3 firmware running on your Samsung Galaxy Tab 2 7.0 GT-P3100.