T-Mobile Network Security Upgrade Disables Features on Older Phones

Overview

• After T-Mobile retired older security standards, select pre‑2017 Android and iOS devices lost support for certain phone features on the carrier and on prepaid brands that use its network.
• Basic calling and texting still work on affected phones, but users report losing caller ID management, call forwarding, call waiting, and fixed dialing controls in settings.
• Some customers with older devices also struggle to send large photo and video messages, though general data access continues to function.
• T-Mobile and partner carriers said they warned customers in advance, yet many people first learned of problems through posts on Reddit and social media.
• Mint Mobile said it will contact customers whose accounts show an impacted device, and both reports advise upgrading since newer phones made after 2017 are not affected.