This problem is already discussed in an older thread and is "answered" although no answer is listed. I had a cable account whch I closed, now I have an internet account for which I get this error message. I get persistent error messages on my cell phone "XFINITY WiFi Hotspots is unable to properly manage secure connections to XFINITY! Please add the necessary permissions to proceed!" I try to do so, then get the number already exists refusal. Phone support is no help.
Hi, dfitzie! Apologies for the delayed reply. Please do not try to bump your post in the future. It is a direct violation of our forum guidelines. You get the "SH400.70.3" error message because your phone number is still linked to your old account. I can't unlink it. Please send me a private message and include your full name, the account holder's name as it's listed on the billing statement. Click on my name ComcastElla, then click Send a message.