Does the Yota SIM card for USB modem support 3G?

Question

Yota

Does the Yota SIM card for USB modem support 3G?
For example, if I insert into an unlocked modem, but I do not catch 4G.

Answer 1

1) it depends on the coverage, not everywhere there is 4g.
2) from the modem, which modem is 3g or 4g
as for the SIM card itself, it works from time to time switching from 3g to 4g, this can be for various reasons, for example, high network load during rush hour, etc.
But the SIM card itself also supports 3g and 4g and even 2g.
Describe the problem specifically.

Answer 2

The yota operator says that the sim card for the modem only supports 4G, but I think how can I deceive the system?