Ahh Finally I can Post Links Now
Z3x v. 17.2 is capable of all such processes.
For that you need to download (no spaces):
Odin307.zip (1.2 MB)
Odin307.zip | by chpettit for Galaxy Tab III 7.0
PreRooted_SM-T211XXAMGL.tar.md5 (1.13 GB)
PreRooted_SM-T211XXAMGL.tar.md5 | by chpettit for Galaxy Tab III 7.0
XSP-T211XXAMGL-20130813114859.zip (736.6 MB)
XSP-T211XXAMGL-20130813114859.zip | by chpettit for Galaxy Tab III 7.0
What you need to do is:
Download firmware
Download Odin 3.07
Boot into download. Hold the Home button down as well as holding Power and Volume down.
Click on PDA and then find PreRooted_SM-T211XXAMGL.tar.md5
MAKE SURE RE-PARTITION IS NOT CHECKED!!! You will have an instant brick! You have been warned.
Click start and wait.
Once done it will reboot into (stock) recovery and finish installing.
Once done and booted just open SuperSU and update the binary. Not by CWM but the other.
TO REPAIR IMEI:
Contect the phone with Z3x in Debug Mode and click "Repair".
Enter correct IMEI and press OK
after its process your tab will show the correct IMEI
Enjoy