There is apparently a way to update the Tbolt firmware. Several years ago a Chinese seller of Tbolts was selling units that he upgraded the firmware from v2.xx to v3.xx He may have pulled a new firmware chip and dumped the image and re-programmed the older ones externally or used JTAG, but that seems like a lot of work for minimal gain. ----------------- > I'm aware (until now) that there is no firmware around and no firmware flashing tool for these GPSes. Maybe the flashing tool(s) is(are) suitable for the Thunderbolt too.