I just got a replacement 600 because my original (14 months old) stopped making or receiving calls after a hard drop onto concrete. My original was an unlocked GSM directly from Handspring, with Firmware of 03.05 and software of 1.12-ROW. The replacement (it appears new, not refurbished) is also unlocked, and has firmware of 03.05 and software of 1.12-INT. Does anyone know the difference between the ROW and INT versions (if there are any) of the software?