I have looked and looked for a solution to this problem and have not found one. I see others are having the same problem though. Any help would be much appreciated! I have the Droid X I am using the messaging that the phone came with not an added app (I am on Verizon). When I try to reply to a text from my husband I get a message saying "unable to deliver. Please re-send with area code". He is in my address book with an area code and the callback number has the area code. But next to his name it does not have the area code (again, it is entered in my phone with an area code). I have tried to delete his phone number, text my phone with his phone, and reply, but that still does not work. It is so frustrating and weird. Even when I do not have him in the address book the call back number (shown as cb#) has the area code, but up higher when his name would be does not have the area code. Any suggestions? We are in the same area code, so shouldn't it go through anyway? This only happens to his texts, no one else. PLEASE, PLEASE help!