Known issue. Usually if the display freezes it would reboot on its own after a few secs. If not, do a hard reset if the dash unit by holding both brakes and pushing the start button until the reboot a teen appears.
Known issue. A fix is due for this.
Again a known issue. Ather uses a Vodafone M2M sim and the only other provider for a M2M sim is Airtel. They used Airtel earlier and it was worse than what you have today.