I got one of these with the intention of setting up MQTT over a mobile network.
It has a Quectel BG95-M3 modem controlled by a Pi Pico W, and an eSIM that is global.

I've managed to connect to VF (I think):
'AT+QNWINFO\r', '+QNWINFO: "eMTC","53001","LTE BAND 28",9485', 'OK'
and get network time
'AT+QLTS=2\r', '+QLTS: "2024/04/10,17:13:27+48,0"', 'OK'

However, I've not managed to set up an internet connection:
'AT+QICSGP=1\r', '+QICSGP: 1,"vodafone","","",0', 'OK'
'AT+CGDCONT?\r', '+CGDCONT: 1,"IP","vodafone","0.0.0.0",0,0,0', 'OK'
activating this profile:
'AT+CGACT=1,1\r', '+CME ERROR: 100'], 'status': 1

I'm clearly either missing something or doing it wrong, or completely misunderstanding something.

Any ideas?