How To Unroot the Samsung Galaxy S II (T-Mobile Version)

Need to send your Samsung Galaxy S II back in for warranty reasons or maybe you just want to start over with a stock device. Here’s the quickest way to unroot the device and get it back to fully stock.

I. Before You Begin.

1. This will erase everything off of the device. So back up any pictures, contacts, etc. you don’t want to lose.

2. THIS ONLY WORKS ON THE T-MOBILE VERSION OF THE GALAXY S II. For any other version please head to our Galaxy S II How To’s and look for your specific device’s unrooting procedure instead.

II. Unroot the Samsung Galaxy S II

1. Download the stock firmware and save it to your computer.

Original Samsung Galaxy S II Firmware (T-Mobile Only)

2. Plug in your device via USB cable and mount the sd card so you can transfer files to it.

3. Copy the original firmware .zip file to the root of your sd card (Not in any folders, just on the sd card itself. Don’t unzip the file either).

4. Unplug the device.

5. Turn off the device.

6. Turn the device back on by holding down Volume Up, Volume Down, and Power at the same time until the recovery screen comes back on.

7. In the recovery menu, select Wipe Data / Factory Reset

8. Now, select Flash .zip from SD card and select the .zip file we just put on the sd card.

9. Once it flashes, select reboot system now and wait for the device to reboot.

10. All set!

If this procedure helped you, please consider donating to the original developer or at least sending them a thank you.

Now that you are rooted, head here to learn some of the fun things you can do!

For all the devices we have rooting procedures for, head here.


Something Wrong? If you notice an issue with the procedure (broken link, steps out of date, etc.), use this form to let us know! Otherwise, if you just are having trouble with the procedure, reach out to us on Twitter, Facebook, or Google+.

  • Richie Gaona

    Why is there not a tutorial for unrooting any of the other samsung galaxy s2 phones? i have an at&t one and dont want to root without knowing theres a way to undo it if needed.

  • peter wang

    Yes please do a tutorial for unrooting samsung galaxy s2 phone (sprint version) I just rooted my phone with your instructions and I want to unroot it when i need to for example, sending in my phone for repairs to sprint. Can’t do it if my phone is rooted (voids my warranty and insurance)

    • http://theunlockr.com David Cogen

      Deal will get to work on that shortly. Check out our How To’s section and find the Sprint Galaxy S2 in there within the week and we should have the how to there for you. Thanks!

  • Isaac

    Plz, How can I download the File ( Original samsung galasy s2 firmware t-mobile)? Or can u sent it to me .. Thx

  • mo

    Thaks Alot!!!!!!!!!!!!!! It worked like a charm!!!!

  • Antonio Torres

    How can I download the original samsung galaxy s2 firmware t mobile? Can you send it to me. Thanks

  • Antonio Torres

    How can I download the original samsung galaxy s2 firmware t mobile?