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