@khamis You posted to an older messy thread. In future you will have more assurance of help by creating your own topic on the forum (which I have done for you today), or sending a private message directly to the moderators.
Please tell us more about your problem.
a) What is make/model of your phone?
b) Has it been unlocked?
c) Where did you buy it?
This message is usually means the phone is locked to another carrier.