T-Mobile EDGE (Enhanced Data rates for GSM Evolution) is a 2G mobile data standard that provides data speeds up to 384 kilobits per second (Kbps) . It was developed to improve the original GSM data standard and provide faster data speeds for mobile devices. T-Mobile is a mobile phone service provider offering EDGE as a customer data service. However, EDGE is no longer considered a cutting-edge technology, as it has been superseded by faster data standards such as 3G, 4G, and 5G.

If you see "T-Mobile EDGE" on your devices status bar even if you have a 4G LTE subscription, it could be due to a number of factors such as being in an area with poor 4G LTE coverage, or there being a problem with your device or SIM card. If your device is stuck on T-Mobile EDGE, you can check your battery-saver settings to ensure they are not affecting your data connection.

Its worth noting that "edge computing" is a different concept altogether. It is a form of cloud computing where data is processed on devices at a networks "edge," rather than transmitting data to a more physically distant data center.