After a couple of hours my RUT241 seems to go offline. not pingable or visible until hard reboot. This happens on multiple units with a statically assigned sim card. Using Verizon Sim and port forward to access a R420 rinstrum indicator. This issues seems to be consistent on various firmware versions including recent ones on the RUT241. throughout the mid-west.
Greetings,
Could you please try following the troubleshooting steps provided here: RUT241 udhcp renew doesn't work - #4 by Matas
Additionally, try setting an APN manually. You can do so by navigating to Network → Mobile → General, disable Auto APN, and then you will be able to add a custom option.
Best Regards,
Justinas