Article: Your tablet must have correct build number.* To check for the build number, go to Settings > About Tablet.   Now turn off your Galaxy Tab 2.  When Odin recognizes your tablet, the ID: COM (yellow) will appear at the top left. Look at the CWM file; it should have the same build number as your phone.  To do this, press the Power, Volume Up, and Home buttons at the same time. When tablet has restarted, back up your tablet. Tap on Advanced > Wipe Cache > Dalvik Cache. Then select the ZIP from the internal storage.   Installation of 4.4 Kitkat is now complete.
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Make sure the battery percent is higher than normal. Check the build number. Download CVM Recovery and Odin 3v1.85_3. Extract and install Odin on your computer. Open Odin on your computer. Hold the Power, Volume Down, and Home buttons for about 10 seconds. Connect your tablet to the computer. Click on PDA. Check the Auto Reboot box. Restart your tablet. Back up. Wipe data or do a factory reset. Select Install ZIP for the SD Card. Locate the Android 4.4 ROM and validate. Repeat with the Gap's file. Reboot the tablet.