Upgrade your Handera TRGpro from Palm OS 3.0 up to Palm OS 3.5.2, featuring new apps, enhanced security, and more.
To determine your current OS version, navigate to Applications > Menu > "Info" > "Version". If less than 3.5.2, use the appropriate PRC or installer below. A compatible version of Windows is required to perform installer updates. It is recommended to use Windows XP or older for best results.
OS must be updated to 3.5.1 before applying the 3.5.2 update.
(Palm OS 3.5.3 upgrade was found on a Japanese website. Be advised that it has been untested, but the filename does match what was released.)