This is what I got from the dealer I got it from;
"How long do you have th Simcard? also, Please try to set up network for me, Go to Initial Set up-> Network-> Available Networks-> select your carrier. If it doesn't work, try to do again with Initial Set up-> Network-> Available Networks-> Network Setup and then select band Automatic and select Speed-> Fast."
but in initial setup there is noAvailable networks but I did fine netorks in another place and did what is said til my battery went dead.