no simcard icon nd sms sending failed
 

hello huys!
i am facing a problem with my n900!
it shows no simcard insert icon but i can receive and make call:confused:
and also i cant send messages!
whenever i try to send msg it says :mad:
sms sending failed!
and in conversation app..a call log appers!:eek:
and whenver i delete that! it re appears!