Utility Use

This sounds like it’s likely a government tax/fee based on your state and local tax regulations (https://www.t-mobile.com/support/account/whats-impacting-your-bill#secondheading).

For additional assistance, you can contact T-Mobile Customer Care (611 from your T-Mobile phone, 1-800-937-8997, message through the T-Mobile app, or reach out to our Social Care team on Twitter @Tmobilehelp or Facebook www.Facebook.com/TMobile) so they can review your bill and if necessary submit a Tax Information Request!