Go into mobile data in the settings, and it'll show which apps are using data and how much. This example is from an Android.
Hello FrustratedDad1,
Thank you so much for reaching out and asking about the data saver option available through your Xfinity Mobile service. I understand the importance of this flexibility with your cellular data plan and I want to ensure that it is functioning properly.
I would love the opportunity to troubleshoot this and resolve it for you.
Please reach out to me via private message. Click on my name ComcastJaredB and from the profile page click on the blue ‘send a message’ button. In your private reply please include the following information so that I may authenticate and access the account;
First and last name, mobile number, complete service address, and the last 4 digits of the pay method on file. Also, if you could please include the IMEI and line number of the device that is not working properly that would be greatly appreciated.
Thank you for your time and patience,
Jared