I am unable to send or receive text messages from one person. When I add the 10-digit number manually (not from my Contact Book) I receive the message "xxx-xxx-xxxx is a landline#. Reply Y to send all TXT messages to this # as voice messages for 0.25/msg +std msg fee." I know for sure that the number I call is NOT a landline as voice calls go through. Any trouble shooting ideas will be greatly appreciated
