To update the D160 handset firmware, you must install Microsoft .NET version 4 and you must use the D160 Upgrade Jig.
To check your version of Microsoft .NET, click Control Panel > Add or Remove Programs. If you do not have Microsoft .NET version 4, download it directly from Microsoft at:
If you update the handset firmware on a live system, you must reboot the base station to which the handset registers once the update completes.
Ensure that the handset battery has enough power to last the duration of the upgrade, which might be a few minutes. Also, ensure that you have the latest USB-UART driver installed for the Upgrade Jig (CDM 2.04.06 WHQL Certified), which is also required. Locate the available Upgrade Jig drivers for each operating system in the Upgrade Jig Drivers folder.
The D160 Handset Writer window appears:
Identify the status display in the D160 Handset Writer.
The Writer application highlights and selects the port number allocated in the Upgrade Jig.
The writing begins. The writing process should take less than a minute to complete.
If the handset was not detected by the application, the status display reads Handset not detected.
Check the connection between the Upgrade Jig and the handset.
Ensure that the handset has a fully-charged and compatible battery.