My Screen does not respond to touch, is jumping about, or has un-commanded response particularly when it rains or it is extremely dusty?

/in , /by

This is not uncommon and is due to the screen being activated by water or dust. Using the Buttons App (a system app available on all our devices), configure a hardware button to enable/disable screen touch. When riding in the rain or on very dusty places lock the screen touch!

I will not have a SIM Card in the device will DMD2 work, including turn by turn navigation?

/in /by

In short yes. Internet connectivity is only needed to conduct online search for addresses, etc, download maps and GPX data and conduct updates. Otherwise it can remain offline and fully functional.