It looks like Samsung Galaxy S6 edge for T-Mobile is getting an over-the-air update to Android 5.1.1 Lollipop. An XDA Developers member posted a video of the smartphone running the latest Android version.
Samsung Mobile or T-Mobile have not announced the updates rollout. So far, it doesnt look that the new firmware is rolling out on a large scale to Big Magenta customers with Samsung Galaxy S6 edge devices.
According to the XDA user who uploaded the vide, the smartphone has become snappier after getting Android 5.1.1. Apparently, the new firmware also locks the bootloader of the device.