hi, i tried to reload my SGS2 with the stock firmware (I9100DXKH2_I9100DXKH1_I9100OLCKH1) from Samfirware.com. before that i used the custom rom (Cognition2) on my sgs2.i didn't do any full wipe before i load the custom ROM.after finished reload he stock firmware with Odin, some of the services such as messaging, call and etc were forced to turn off by my SGS2. i tried to reboot my SGS2 a few time