[Samsung Galaxy Tab Plus] gersen416:
GT-P6210 US Wifi No longer working - Fix Process for Noobs

Had the same problem with my rooted GT+ which is apparently Busybox update related. I realize some details have been posted but thought a detailed procedure may be useful to cut down the time involved for people new to reflashing and using Odin.

Here is the step-by-step procedure (Windows 7 or XP assummed)

1) Download the stock firmware for the GT+ US wifi version at post #119 the following link:

http://xdaforums.com/showthread.php?t=1367478&page=12

The file is named: GT-P6210_XAR_P6210UEKL1_P6210XARKL1_P6210UEKL1

2) Find and download Odin 1.85 (link below) and extract it to your dektop.

http://xdaforums.com/showthread.php?t=1367478

3) If not already done, locate, download and install Kies to ensure your GT+ drivers are installed. Make sure Kies can detect your GT+

4) Turn on USB debugging on your GT+ and then check the device manager on your computer to ensure the GT+ device and Android debugging interface are detected (this step is just precautionary).

5) Shut down your GT+ and start download mode using the Power + Vol Down and then Vol up key combination. If you don't know how this is done for your GT+ Google it.

6) Start Odin - there are many excellent tutorials on how to use it.

7) Connect the GT+ (which remains in download mode) using the USB cable - Odin should detect it and add the COM interface (yellow) showing the GT+ is connected.

8) If not already done extract the stock GT+ firmware from the file downloaded in step 1. The file is named: P6210XARKL1_P6210UEKL1_HOME.tar.md5 for the US GT+

9) Click the PDA button on Odin and point at the large (980MB) file extracted in step 8. Make sure ONLY the Auto reboot and F. reset time check boxes are set. Brick alert - Odin is all powerful. Hence the name. Don't mess with anything else you (and I for that matter) don't understand

10) Click the big Start button on Odin. Reflash process should start and progress. In about 10-15 min the reflash should complete. Congrats you are now back at stock GT+ firmware. Alas your job is not done grasshopper.

11) After the GT+ reboots wifi should again be working. Reconnect Kies and download the firmware update. Reboot. Your GT+ is now back at the stock UELA3 build.

12) Locate the Root+CWM zip file located at the link below. Read instructions carefully please.

http://xdaforums.com/showthread.php?t=1379532

Download and copy the zip file you prefer to the GT+ SD card (do not unzip). Put the GT+ into recovery mode (Pwr+Vol UP), select and flash the Root+CWM recovery. Your GT+ is now rooted again and has CWM recovery. Reboot

13) Re-start the GT+ in CWM recovery (Pwr+Vol up) then select and perform perform a complete nandroid backup of your stock UELA3 version rom so you can restore this easily. Your GT+ should now be safe.

14) Load SU from the market and busybox installer (should you wish to - I will not until I hear that the problems have been fixed).

15) <Advanced step to fix SD card RW permissions> Load/buy Rootexplorer from the market. Navigate to /system/etc/permissions and load this directory as R/W.

Edit the platform.xml file to add the line:

<permission name="android.permission.WRITE_EXTERNAL_STORAGE">

<group gid=""media_rw" />

</permission>

Your SD card should now be R/W - test and confirm.

16) Redo step 13 should you wish to capture the last change.

Congratulations - your GT+ is back to stock, rooted, has CWM and a nandroid backup that can be quickly restored should another root app like busybox mess up your system.

Cheers