i cant get into my comcast account

user_1af58b, Hi there! Thanks for reaching out. I can understand how important it is to be able to log in to your account. I am sorry to learn about this experience with not getting logged in. Youve reached the right team. We are a team of experts who are dedicated to helping with solutions to log-in concerns such as this. We are happy to assist. Have you tried doing a password reset like in this link here yet by chance? Are you able to send us a screenshot of what you are seeing on your end when you get 400?

user_1af58b, Thanks for confirming that for us. Have you tried another device, clearing cache and cookies, or another browser to see if you experience the same error?