Caution- if you switch tom comcast phone and you already have comcast internet service, you will not be able to access you email through comcast.net for up to 72 hours while they "upgrade" your smartzone account. They don't tell you this of course, but they know it is part of the process.
Today they told me to keep trying to log in for the next 72 hours until I'm able to get in. If it goes past 72 hours and I still can't access it, then call them back.
This doesn't have a huge impact since I can check it whem I am at home on my pc, but I know many people like to check their email when they are away from home - which is part of the basic internet service that we pay for. If I would have known about this ahead of time I could have planned better.