When Samsung announced its official roadmap for US Android upgrades, T-Mobile customers were left in the dark: Samsung said it was "in close communication" with the carrier and would be providing more details soon. Those details have now been released, confirming four devices that will be getting Android 4.0: the Galaxy S II, Galaxy S Blaze 4G, Galaxy Tab 7.0 Plus, and Galaxy Tab 10.1. This corroborates part of a leaked document promising an upgrade for the Galaxy S II, but the May 14th date given there has come and gone, leaving us with no real hint at when these will be rolling out.
Outside the US, Samsung has begun updating its Galaxy family, but so far some American carriers, like AT&T, have held back its software for stability testing. T-Mobile is beginning the upgrade process for HTC's Sensation 4G this week, so hopefully we'll be seeing some progress on Samsung in the next month or two.