XBee3 Cellular NB-Iot

My device is the “XB3-C-A2-UT-001”.
I try to use 2 SIM cards from local Cellular providers. The SIMs are not being detected. The phone number is empty. Also, the association indication is 22.
My provider has NB-IoT.
What I can I do?

Did you try to use

import network
cellular = network.Cellular()

The phone number section can be empty sometimes even though it is connected to the network.