Last OS update, Samsung had its version rolling out 31 days after the Google launch. But not all phones actually got it right away. Variations in network can play a role here, and some see quite a delay. It also looks like Samsung is running a phased roll-out, if a timeline that appeared on TimesNews is correct.
Samsung released the 6.0.1 Marshmallow updated for Galaxy S6 and S6 edge phones in South Korea on 30 January 2016 and it began rolling out Android 6.0 Marshmallow updates for the Galaxy S6 and Galaxy S6 edge from 15 February.
A leaked release schedule from SamsungViet claims updates for Q1 2016 will arrive on the Galaxy Note 4, Note 4 Duos, Note Edge, Galaxy Note 5, Galaxy S6, S6 Edge, S6 Edge+, S6 Duos, Galaxy S5, S5 Neo and S5 LTE-A.
Updates for the SGS6 family of devices started in February and continued through March, covering off US devices as well as Europe. We have it on our SGS6 models in the office in the UK.