Submitted application and requested supplemental material online. Received an automated message to schedule a phone interview with a recruiter a few days later. Conducted 30 minute general screening interview and was told to expect follow up in a week. After three weeks and several emails I received no responses. My application was still showing as under review for a few more weeks after that, but was eventually closed out about a total of two months after my phone interview.
This has been my third phone interview with Comcast and the experience has been about the same. No promised follow ups and huge delays between screening interviews and any meaningful developments.
Even if you do progress to the in-person stages expect those to go slowly. I have heard it can take anywhere from 3-9 months from application to start date. If you need a job quick this is not the company for you. If you are a student and want to work for Comcast start your search there at least an entire semester before graduation.