The One Click Lag Fix app rooted my phone, but -- and its developer is aware of the problem -- it cannot unroot it (this is Captivate specific). I did a lot of research and couldn't find a good way to do it. I found this Update.zip file that is actually works (it unroots). It worked for me. I'm posting this information and file here because it was a painful process and I couldn't find this information anywhere on the web. Just follow these steps (Usual disclaimer: I am not responsible for any damages): 1- Copy the attached Update.zip to your \sdcard folder 2- Turn off your phone 3- Turn on your phone, while holding the Up and Down buttons simultaneously on your volume control. This will take you to recovery console 4- Select the option to reinstall packages. This is it it will reboot and unroot your phone. Note (Dev talk alert): Someone needs to tell the One Click Lag Fix developer that his script for unrooting is missing the SGH-I897 conditional in the assert statement. That's why his Update.Zip does not work on the Captivate. I found out the hard way.