iPhone 6s, ATT I have been having issues sending texts. I am getting a message stating the number is not a proper 10 digit number. Yes, the number is correct. I end out calling the person with that same exact number. Ex. In contacts, number displayed is (123)456-7890, in the send to of a text box it is 1(123)456)7890. That creates an 11 digit number and will not send. Gives a message to try a legit 10 phone number. It happened just now when I tried to text my brother in another state, had to call him i stead. A few weeks ago, I tried to text my brother-in-law, down the street. Happened again. It is his correct number. Had to call instead. The phone is adding a “1” to front. There is no “1” in my contacts listing of that number. I tried manually inserting that number in the text to box, because it is in my contacts, I have to select the person. I can’t leave it just as the number and scroll down, type the message and send it. I also tried turning off dial assist in the phone settings. I also have SMS on. I also turned off my cellular so it would go over WiFi. It was the exact same result. Also tried with my husband’s iPhone 5. I got the same message. The recipient number is correct, so please do not say to check the contact. Both non-apple people’s contacts are correct. The 1 does not appear in their contact info, it is added when the text is sent. I thought maybe ATT, but turning cellular off netted the same result, an 11 digit number. The error message stating I need to enter a legitimate 10 digit number, shows that number with the 1 added to the front of the number. I don’t know when this started, but it was not always like this. No, a solution is not to delete the contact as one Google resoonse was. Cannot be deleting a contact before every text message. Any idea why this is happening and an actual fix? Thank you.