We have seen how to root Samsung Galaxy Ace in the previous post.Root Samsun Galaxy Ace 2.3 GingerbreadAfter rooting you have to unroot the phone for doing any warranty related services. For that lets unroot Ace.
Steps To Unroot:
2. Now Place this File in your SD card. ( You can place it inside any folder you want, but its better just to place the file on SD.)
3. Turn off the phone and boot into recovery---
"Boot your phone into recovery mode. For doing this , hold "HOME+POWER" buttons. When the screen turns on and you see the Samsung logo, let go of POWER but keep holding HOME. After the Galaxy Ace logo shows up and disappears, you should enter recovery mode."
4. Install the unroot.zip
"Now in recovery mode, scroll to the second option " apply update from SD card". For scrolling use volume up and volume down buttons. Select using Home button.Scroll to the Unroot.zip file and select it. See if you have put it in a folder then,open that folder and then select the file. "
6. Restart phone
When you see its fully installed, select "reboot system now" and the wait for device to reboot.
7. Look in the app drawer and if all went well, the superuser icon should no longer be there!
There your Ace is successfully Unrooted!!!!