Verizon and AT&T unleashed the Android 6.0 Marshmallow update onto their Samsung Galaxy Note5 users in March and towards the end of the same month, Sprint joined in as well.Now it's time for T-Mobile to do its thing - the update is available Over The Air and it weighs in at 1,420MB so make sure to download it over Wi-Fi.Downloading the Marshmallow update for T-Mobile's Galaxy Note5The update