To quickly check if your Handy is using Firmware 2 or Firmware 3, you can simply press and hold the Wi-Fi button on the Handy until the LED pattern changes.
 |
Firmware 3A Handy with Firmware 3 will display a solid dark blue — indicating that it has entered Bluetooth mode. |
 |
Firmware 2A Handy with the legacy Firmware 2 will alternate between a light blue and darker blue light — indicating that it has entered Wi-Fi setup mode. |
If you wish to upgrade from Firmware 2 to Firmware 3, use this guide or if you wish to downgrade from Firmware 3 to Firmware 2 use this guide instead.