I have LTE USB modem attached to Raspberry Pi 4 with Raspbian installed. LTE modem was configured automatically and Internet connection is up. I don't remember SIM card phone number. How can I check it remotely? I can't disable LTE connection because I use it to communicate with RPi (SSH).

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    Ah, you need to call the carrier who sold you the SIM card: wikihow.com/Get-Your-Mobile-Number-from-Your-SIM. – tlfong01 Feb 27 '20 at 7:45
  • This question is off topic, but as an ex mobile planner GSM/3G devices DO NOT necessarily know (or even need) an MSISDN; all signalling is based on IMSI - the relationship between MSISDN and IMSI is a network function. Phones which list the MSISDN only do as as a convenience – Milliways Feb 27 '20 at 11:20

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