Priacta discourages Windows Mobile 6 for managing very large task lists. The technology is slower and less reliable than newer options. If this describes you and your phone is at the end of its life, consider upgrading to a phone that works well with your ideal task list. (That is a good time to choose a new task list, if you are considering it.)
To sync, you’ll need to use Nuevasync (www.nuevasync.com) to get the best TRO results on your WinMobile 6 with Toodledo.
No syncing is required if you access your Toodledo tasks at www.toodledo.com/slim. You will need an active cellular data connection.