Hi guys, i am still learning how to on my n900, and now i face this problem, i tryed search but no accured found, i made upgrade to KP51, as usual, all went well, but after few hours i found out, that when i recieve SMS there is no alert light and tone, unles i keep conversation window open on background, so i made clean flash, again install KP51, and i am using CSSU testing, and same problem. Is there anyone who hase same problem?? or somebody who can give me help how to fix this think