First, you need to root your device. Below is the link.
http://theunlockr.com/2010/11/29/how-to-root-the-samsung-galaxy-tab/
Second, you need to install SGT-Bootloader-Patch-v1.00.apk. Below is the link.
http://www.mediafire.com/?mp51s9zyy8sis86
Third, you need to download the ff:
1. Main Firmware (227MB)
2. Pit File (557b)
3. dbdata.tar (1.92Kb)
4. Rooted Kernel (5.99MB)
5. Flashing Program (196.71K) ODIN 1.7
Upgrade Procedure:
1. Make sure that your Galaxy Tab is powered off & its USB cable is disconnected from the computer.
2. Go to download mode. You can do this, by pressing the Volume Down button and the Power button together until you get the following image appearing on your Tab’s screen
3. Now connect your Tab to the computer with the USB cable. Then open the flashing program ODIN 1.7
4. Now click on the “PIT” button, and a file selection window should open. Look for the following file “gt-p1000_mr.pit” in the extracted folder and select it. Next click the “PDA” button, and select the “P1000XXJQ1_P1000XX....HOME.tar” file. Then click start. (process will take 2-3mins)
5. Once you’ve seen the green “PASS!” notification, it means success! By now, if you look at the Tab, it would have rebooted itself. It should be rebooting into the stock Samsung ROM. Before the start up animation, long press power button 'til it off powered. Close ODIN 1.7
6. Back to download mode by pressing the Volume Down button and the Power button together & open ODIN 1.7
7. Next click the “PDA” button, and select the “dbdata.tar” file. (Un-check Re-Partition) Then click start. Again, before the start up animation, long press power button 'til it off powered.
8. Go to Recovery Mode. Press the power button and up volume button. After 5 seconds lift up the power button still pressing down the up button. Go down to wipe factory data reset and press YES using HOME button. Then press REBOOT using HOME button. Before the start up animation, long press power button 'til it off powered.
10. Next click the “PDA” button, and select the “CF-Root-TAB7_XX_OXA_JQ1-v3.3-CWM3RFS.tar” file. (Un-check Re-Partition) Then click start. (process will take 2-3mins)
Click next.. next... next... & ENJOY YOUR SAMSUNG GALAXY TAB, RUNNING AT GINGERBREAD 2.3.3 ROOTED
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