The company said on Friday that it had begun distributing the Cupcake update to G1 handsets in the UK, and that US G1 owners can expect the update to begin arriving in one week.
News of the impending update arrived last week, when T-Mobile told UK users to expect Cupcake during May after the final build of the software was pushed live.
The eagerly anticipated update adds a number of features to the G1 handset, most notably the ability to utilise the device's touch-screen keyboard capabilities, and new components which allow users to shoot video on the handset and upload directly to YouTube.
Earlier this week Google was listed as one of 46 companies being sued by a US business owner who claims to own the rights to the Android name.
Warming was most pronounced in Siberia region
The tank will be subjected to high stresses and loads via dozens of hydraulic cylinders during testing
'Sunlit wet sidewalk' provides evidence of methane rainfall on the north pole of Saturn's moon Titan
Methane rainfall indicates the start of the summer season in Titan's northern hemisphere
Scientists believe there could be other hydrides or superhydrides with super conducting properties