Hi, I purchased a Samsung Galaxy S 2 from Sprint. I have learned that on XDA this phone is called Samsung Galaxy S 4G. I am not a pro when it comes to rooting phones but I come from a EVO that I had rooted and flashed many roms. However my Galaxy S 2 has me stumped! I rooted it and it has not worked the way it should. I cant get my GPS to work on any ROM I have flashed. I have been through the forums, Google and anything else I could thing of. I Have tried every app or fix idea I could find and still nothing. I am now at the point where I would like to unroot my phone and start over. I feel as if maybe I have done something wrong. However I cant find a video or directions how to unroot my phone back to stock. I know my phone came with ICS and all the videos or directions I find are from 2.3. Can someone please help me with this?