I can receive text messages from a Sprint Galaxy phone, but when I reply to the text I get this reply: "Error Invalid Number. Please re-send using a valid 10 digit mobile number or valid short code". HELP!!!
For some reason my iPhone 6 plus can receive text messages from a Sprint Galaxy phone, but when I try to reply to the text I get this error message "Error Invalid Number. Please re-send using a valid 10 digit mobile number or valid short code". I called At&t and found a work around, which is to use brackets [ , ] , instead of the area code parentheses. BUT this then causes the message thread to appear in two separate boxes on my messages app. Ive never had this problem before and have always been able to text people with sprint phones. Ive tried resetting my phone, deleting the contact and re-saving it.. everything!! How can this be fixed???
iPhone 6 Plus, iOS 8.4, At&t carrier