Is your device able to resolve rms.teltonika-networks.com?
Could you SSH into your device, execute the commands below and share the output?
- telnet 22.214.171.124 15009
- telnet 126.96.36.199 15010
Could you try logging to router's WebUI, navigate to Network -> Interfaces -> -> General -> [mob1s1a1] settings, switch to Advanced settings tab and add a couple of servers to Use custom DNS servers field:
I also see you using a custom APN. Are you in some private network?
Could your provider block any of the addresses/ports provided here?
The second device with the legacy firmware at the moment is still registered under a different company than the first RUT, and is currently shown as offline.