@kenichiwa, please help open ticket. I understand your pain. Certain recovery can be done by tech support. We do have US support team to cover your timezone.
Cellular firmware recovery is not straightforward. In fact, not every of your cases is related to the cellular module. Below are the steps I provided in the ticket which allow you to do the problem isolation.
-
Ensure the SIM card is tested and working fine with another cellular router at the same location. If it is not a new SIM card, make sure it has been tested with at least 2 cellular routers besides the original router.
-
Ensure the cellular antennas are connected to router properly.
-
Ensure you get good signal strength, signal quality.
http://blog.industrialnetworking.com/2014/04/making-sense-of-signal-strengthsignal.html -
Ensure you have the APN details if you have custom APN.
-
Ensure you have the latest router firmware.
-
Ensure you have the latest cellular firmware. You have done this in this ticket via support.cgi page -
http://<LAN IP>/cgi-bin/MANGA/support.cgi -
Report to Peplink if step 1-6 doesn’t help.
Thanks.