My RUT950 will not connect to LTE using a contract data only SIM. It connects to the LTE mobile network but is not allocated a WAN IP address so there is no data connection.
The RUT950 Firmware version is the latest RUT9XX_R_00.06.02.2_WEBUI.bin and I have also tried the earlier firmware too that was originally installed, all exhibiting the same problem.
Extensive testing and attempts have been made to solve this. Testing the same RUT950 alongside an alternative contract data and calls SIM and revealed the following behaviour
Mobile Configuration Service Mode “3G only” selected. Using Network Operator’s contract data only SIM: Connects with 3G data. Pass.
Mobile Configuration Service Mode “3G only” selected. Using Network Operator’s contract data & calls SIM: Connects with 3G data. Pass.
Mobile Configuration Service Mode “Automatic” selected. Using Network Operator’s contract data only SIM: No LTE data connection. Fail
Mobile Configuration Service Mode “Automatic” selected. Using Network Operator’s contract data & calls SIM: Connects with LTE data. Pass.
I will be contacting the Network Operator to try an alternative contract data only SIM or if they can explain anything about the SIM behaviour or difference.
If this is unsuccessful I may approach Teltonika about a replacement and perhaps they can investigate the problem in the returned device’s internals as done for EddZig. I am happy to message and send a troubleshooting file if that could help beforehand.
Since this LTE connection issue appears to be a wider problem than my own RUT950 router, here are all the other open reports collated from investigating and trying to solve the problem so far
Possibly affected devices: RUT240, RUT950, RUT955
Threads:
https://community.teltonika-networks.com/5458/rut-240-mobile-network-status-disconnected
https://community.teltonika-networks.com/1215/issue-with-mobile-connection-using-contract-sim-and-static
https://community.teltonika-networks.com/880/mobile-data-status-disconnected
https://www.amazon.com/Teltonika-RUT950-Availability-Router-Version/product-reviews/B078XP9PXP (see Josh H comment)