Thanks for hint. I copied scripts from Debian. I tried get-operators to get path for device and then set-tech-preference, but how I should write tech-argument? I tried 2G.

There was interesting script monitor-ofono, I started that and then I try start connection with GUI, but monitor-ofono continue just showing signal strength like before starting connection.

It seems that there is enough scripts to make full connection test from start to end in command line, but needs more knowledge than I have. How should I make test?