Android 6.0.1 Marshmallow is currently rolling out to the global version of the Galaxy S5 (SM-G900F). This comes after the Marshmallow operating system update was rolled out to other Galaxy S5 versions including those on the Sprint carrier, as well as to users in South Korea and Trinidad & Tobago. The global S5 version with a model number of SM-G900F is widely spread among consumers in the European, Latin American regions as well as a number of countries across Asia.
Similar to former roll outs, this new Android 6.0.1 update is expected to weigh about 1.5GB, which means a stable Wi-Fi connection coupled up with over 80 percent of battery charge will be necessary before beginning the upgrade process.
This Galaxy S5 upgrade to the Marshmallow software, will not bring the huge visual differences to UI as seen on the much newer Galaxy devices. However, you can look forward to the core Marshmallow feature-offerings including Doze battery manager, Google Now on Tap, customizable app permissions as well as a boost to the current Android security patch from Google.
Considering the update is rolling out to the global variant which is found across a variety of regions, there is no set time frame within which the update will reach a particular handset in a particular country. Even so, the update has already been seen on a few of the smartphones in Sri Lanka. So just sit patient, at least its on its way.