I have a captivate. When I compose a text message the persons number initially shows up as the ten digits. Now when I close out of the text message and try to go back and serbs something the persons number shows up as only 7 digits. When I try to send a text with only the 7 numbers I get a return error message saying 8852662 Error Invalid Number. Please re-send using a valid 10 digit mobile number. Any clues ?