I greatly appreciate your outreach to us through the Xfinity Forum, and I also want to apologize for my untimely response. Know that we are aware of this issue and are working to get this resolved.
In case you still need assistance and information on how to add new mobile lines to your existing account, you can go about this in 2 ways; 1. By adding a new mobile line with the purchase of a new mobile phone or tablet through Xfinity Mobile, and 2. Through our BYOD (Bring Your Own Device) program.
The BYOD program allows new and existing customers the opportunity to add a network compatible device to their account, and obtain Xfinity Mobile service without the need of purchasing a brand new hand-held. I’ve included the following links that provide the needed information regarding the BYOD service;
Please keep in mind that adding new service lines to an existing account or starting a new account altogether, requires having to visit a local Xfinity Mobile store or by calling our customer support service line at (888) 936-4968. As of now, we are unable to add new lines or initiate new accounts through social media.
Let me know if you have any other questions.