How to Unroot the Sony Xperia Arc S

Perhaps you’re done playing with root and custom ROMs on your Android device? Regardless of the reason, it’s usually pretty easy to unroot your device and go back to the stock firmware.

Some of the reasons for unrooting your Sony Xperia Arc S are:

• Sending in the device for warranty (most, but not all unrooting procedures reinstate the manufacturer warranty if you had one before rooting).
• Starting over (simply undoing everything you did while rooted so you can have a clean slate to start over).
• Fix any issues (Maybe rooting messed something up? No problem, unrooting will take care of it for you).

Ready to get started? Here’s how to unroot the Sony Xperia Arc S:

I. Before You Begin

1. You should have rooted your device using the procedure given here.

2. This should only work on Windows based PCs.

II. Downloading Required Files

1. Download Flashtool and save it to your Desktop.

Flashtool (Download link’s given in the first post)

2. Download the appropriate stock firmware for your device and save it to your Desktop.

Stock Firmware (Download link’s given in the first post)

III. Unrooting the Sony Xperia Arc S

1. Extract files from Stock Firmware archive by right-clicking on it and selecting Extract here.

2. Double-click on Flashtool setup file and install it on your PC.

3. Copy the Stock Firmware (.ftf) file from your Desktop over to the firmwares folder available inside where you installed Flashtool.

4. Launch Flashtool by double-clicking on its executable file.

5. Click on Thunder icon in the tool, select Flashmode and hit OK.

6. You should now see all the firmwares available inside the firmwares folder. Click on your Xperia Arc S’s firmware and hit Flash.

7. Turn OFF your device.

8. Hold down Volume DOWN and plug in your device to your PC.

9. The tool should automatically start flashing the firmware on your device.

10. Once the firmware’s been flashed, reboot your device.

11. You’re all done!

All set! You are now running stock firmware on your Sony Xperia Arc S and have unrooted it.

Want to try again? You can always reroot your device by heading to our Rooting How To’s section, finding your device, and doing the How to Root listed for it there.