My Xfinity sim card is not working

user_kt9wap I know how important it is to have phone service to rely on in case medical assistance is needed. Are you seeing an error message? What troubleshooting steps have you tried so far? You can select the make and model of your phone when you click this link and enter the issue you're encountering, and it will walk you through the troublshooting steps required to resolve the issue :). Please let me know if you run into any questions.