To fix a contact's name appearing red in iMessage, you simply need to remove the communication limit on your iPhone using these steps: Open the Settings app on your iPhone and scroll, Another reason a contact might be appearing in red could be down to having added someone into a group chat with their email address instead of their phone number. But don’t panic because it’s a simple issue to fix ., When I try to send a text, some of the contacts come up in red instead of blue and I cannot send a text message. Any ideas? This happens when the person you are contacting is not registered with iMessage. Because your iPad is not connected to your phone policy (just data if anything), you are not able to text regular numbers., When you try and send a message to someone from your iPad or Mac your message is not sending and a dialog pops up saying: Your message could not be sent. [phone number] is not registered with iMessage., I have a one iMessage group text going that a contact is in and her name is blue. We started another one last night and when I try to add her to that one her name turns red. We are all running ios10., If messages continuously appear in red when trying to reach a particular contact, it might imply that there are connectivity issues that need addressing. Moreover, regular instances of red messages might also affect your user experience..