As I have met a fair share of N900-es it seems they were all 2101 at least from the summit onwards, BUT there *were* differences with regard to the finish. For example my DDP N900 has matte buttons, but the one a friend bought in a local brick-and-mortar shop had (slightly) shiny ones (both are English layout kbds). Will try to take a snap of the two side by side when we meet again.