The company is gearing up to launch a new Nokia-built product on Tuesday by touting the line "Green with envy."
And apart from a countdown timer running down on the Nokia Conversations blog, Microsoft is offering very little information about what we can expect.
However the references to the colour green and the diagonal lines in the graphics on the page suggest that it's going to be a new range of Nokia X phones.
The X Phones combine a forked version of Android (rather than Microsoft's smartphone operating system) with Nokia's design sensibilities to offer consumers in emerging markets an affordable first smartphone handset.
And although they are technically Android phones, all of Google's services have been replaced by their Microsoft or Nokia equivalents -- so Bing rather than Google search and Nokia Here rather than Google Maps.
What's more, by using Android rather than Windows Phone as the OS, the internal components can be of a lower specification, meaning that the handsets are also much cheaper to buy. The first Nokia X phone, announced in February, retailed for just Ä89 and clocked up 1 million pre-orders in China.
Nokia will reveal all at 3 a.m. ET on Tuesday, June 24.