Credit: Joe Maring / Android AuthorityTL;DRT-Mobile recently upgraded its security standards, retiring older methods in the process.Virtually all phones made before 2017 should be unaffected, but older devices might have problems with caller ID, sending larger multimedia messages, and more.The simplest solution is to upgrade, as older phones are already more vulnerable to security issues, and this is just another reason to move on.T-Mobile recently upgraded parts of its network and, in the process, retired some of the old security standards used by some older Android and iOS-powered devices. The change impacts select older devices on both T-Mobile’s network and any prepaid provider that runs on it. The good news is that pretty much every device made after 2017 is unaffected, but if you’re still rocking something older, now is the time to move on.Don’t want to miss the best from Android Authority?