Xfinity collects email address, user ids, phone number, without sharing it with third parties according to its label.
Email address
App functionality, Account management
User IDs
App functionality, Analytics, Account management
Phone number
App functionality, Account management
Other app performance data
Analytics
App interactions
App functionality, Analytics, Personalization
Other user-generated content
Analytics
Voice or sound recordings
App functionality
Device or other IDs
App functionality, Analytics