While most of Samsung's flagship devices have already received the Android 6.0 Marshmallow update, there are a few stragglers that have been hanging around in the back of the room waiting for their very own over-the-air software upgrade. Among them was the Galaxy A9, a device which so far has only been released in China and started receiving the update as of yesterday, and the Samsung Galaxy S5 on T-Mobile which is apparently now getting the update to Marshmallow as well, as the OTA has started hitting devices, and T-Mobile has now updated their support page to include details of the Android 6.0 OTA for the device.
T-Mobile's support page lists that the update push was to begin today, so it's less likely that any Galaxy S5 owners on the network have received the update officially through the OTA method prior to today. It's also worth mentioning that not all Galaxy S5 users are guaranteed to get the updated software before the day is done, so there is a chance that some subscribers on T-Mobile will still be waiting through the end of the week to move forward from Lollipop to Marshmallow.
As with all updates to Android 6.0, the Samsung Galaxy S5 will be getting access to new features like Google Now on Tap, as well as Doze Mode and App Standby to help with improved battery life on the device. Users will now also have more control over the permissions requests from apps, and instead of having to grant permissions upon installing an app, Marshmallow changes this to granting permission upon opening the app. Marshmallow also enables the use of a microSD card as internal storage. At least half battery life will be required before starting the update process and before installation can begin, either charging the device or plugging it in is recommended. While some updates to Marshmallow for other devices have been under 700MB, the Galaxy S5 update file sits at over 1GB, so it's strongly recommended that users connect up to a WiFi network for the download and installation process so they don't eat up part of their 4G LTE data limits.