What settings does a 3g modem need to connect to Tinkoff.Mobile?

Question

network hardware

There is a router. Old Keenetic.
There is a usb modem 3g e173.
There is a Tinkoff.Mobile sim card with the first trial month of communication.
The modem is untethered from operators.

What settings does a 3g modem need to connect to Tinkoff.Mobile?
Now it doesn't turn on. Gives "protocol error"

Answer 1

Most likely the wrong authorization method.
Try other options

Answer 2

Ask in their support

Answer 3

solved the problem? also needs to be connected