hi dudesss, sorry for the delay and thanks for the helpfull site, i learned from you that i have to made search before posting and describe the problem in a professional way.

I am using a jailbreak with ultrasnow iphone 16GB (3.0 OS 04.26.08 Modem Firmware) using Vodafone sim card and while i try to send sms i got a problem that you message cannot be send with no error code, i can make/receive calls and receive sms too but cannot send sms.

I tried to change the carrier i used another sim card with another carrier( QTEL) i can send sms perfectly.

I tried to check the message center number and the message center is ok.

It's a strange problem, hope to help me as usual and thanks for your previous cooperation.