Yesterday I followed this thread (http://forum.xda-developers.com/show....php?t=1679563) and root my phone. But after using one day I didn't feel good using jelly bean on my galaxy so I decided to unroot my phone and revert it back to my previous version that was android 2.3.6 gingerbread. I unroot my phone and did factory reset from recovery mode but now my phone is not working and even recovery mode is not opening. It is just showing starting logo. Please someone help me to fix this problem so i can get back my phone.