Osmocom pySim

SIM Cards & SmartcardsReady to RunLocation: System-wide binaries

Command Line Execution

Run this command in the TelcoChisel terminal to launch or execute the tool:

Osmocom pySim Command
pySim-shell --help

Detailed Technical Overview

Osmocom pySim is an interactive scripting suite and command shell for editing, provisioning, and auditing SIM, USIM, and ISIM cards. It supports raw APDU read/write, file system navigation, and security key modification.

Configuration & Usage Guide

To initialize and configure Osmocom pySim for telecom security audits, follow these steps:

  1. 1Insert your SIM card into a PC/SC compliant USB reader.
  2. 2Launch the interactive pySim shell: pySim-shell -p 0
  3. 3Read card information: verify_adm_and_read_imsi or select USIM directory to dump parameters.

Troubleshooting & Security Audits

Osmocom pySim Audit Warning
To edit sensitive parameters (IMSI, K, OPc), you must supply the card-specific ADM (Administrative) PIN key.
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Frequently Asked Questions

Does pySim support eSIM?

Yes, it has modules to read and interface with eSIM card structures.

Can I write keys to a retail SIM card?

Retail SIMs are locked and lack writeable flash memory. You must use programmable sysmoUSIM or similar test cards.

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