Best network to connect to is determined by the modem within the RUTX50, and it is not running our software. In this case, I would recommend simply adding operator whitelist, or configuring the Manual-Auto selection in the Network → Mobile → General settings.
I’m currently at another location in Sweden. here Huawei is significantly slower than the Teltonika. It looks like it’s really random in which cell the modem logs on. can this be influenced?