I receive this error when trying to text a couple numbers in my phone book. It tells me that I need to use resend using a valid 10 digit number. It does not happen on all numbers in my phone just a couple.

I have tried deleting the contacts and re-entering the phone numbers, but that does not solve the problem. If I receive a text from one of these numbers, I cannot respond to it because I receive the same error.

When I receive a text from one of these numbers, it shows up with the contact name, but only a seven digit number (the number minus the area code).

Any help out there?

 

Additional information: I just tried messaging this number through google voice. It worked fine.