There are a few different Samsung Galaxy devices getting Android 6.0 Marshmallow today, including both the Galaxy S6 and S6 edge on T-Mobile. Both updates include Android 6.0.1, and they’re both also around 1.3GB in size, so you’re probably going to want to find yourself a speedy Wi-Fi connection before you start downloading them.
Meanwhile, Verizon is pushing Android 6.0 to its Galaxy S6 edge+. Along with a bump to Marshmallow, the update brings Wi-Fi Calling support and Edge Panel improvements, like a larger Apps Edge column that also has support for folders.