Owners of the Samsung Galaxy S6 and Galaxy S6 Edge on T-Mobile's network are due to start receiving updates to the software today, which, although these updates don't include a bump up from Android 5.1.1 Lollipop to Android 6.0 Marshmallow, they still include things to better the overall performance of the phones and that's something that users should be delighted over. What the update includes seems to be mostly about improvements to the performance of the device, and some included tweaks to the software. Users with these two devices on T-Mobile report seeing these update roll in, but it doesn't seem like T-Mobile themselves have detailed the changelog on their support page just yet.
According to a user with the Samsung Galaxy S6 Edge who captured a screenshot of the changes from the software update, it appears lots of optimizations have been made. When T-Mobile subscribers get this update they should expect to see some improvements to the battery life, along with optimization of the process for closing apps that aren't being used. Another big improvement besides battery life optimization are the security fixes, as the changelog lists that security of the device has been improved compared to before the update came through.
It looks like Samsung has also removed the Milk Video app within this update, so once you update your phone's software that particular application should no longer be on the device. The last detail within the changelog points to an overall improvement to the stability of the Call functionality, so you should expect to see improvements with voice calls going forward. The software update only weighs in at 96.22MB which doesn't indicate a huge list of changes. It also means that it shouldn't take users long to download and install it once they start the process. As with all software updates though, it's a good idea to make sure you have as much battery life as possible on the device before you start as well as the required amount of room to store the update package. It's worth mentioning that the details listed only point to the Galaxy S6 Edge as none were given regarding the Samsung Galaxy S6, although changes with the software probably aren't too different.