python libraires and command line tools for SIM/UICC/USIM/ISIM card analysis and programming.
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Christian Amsüss 3cec0150ee Merge branch 'chrysn/for-29033' into chrysn/ota 5 months ago
contrib WIP SMS 6 months ago
docs pySim-shell: Add 'decode_hex' command for transparent + linear EF 11 months ago
pySim Merge branch 'chrysn/for-29033' into chrysn/ota 5 months ago
pysim-testdata add missing bit definition for NG-RAN in xAcT 1 year ago
scripts scripts/deactivate-5g.script: Also disable service 126 7 months ago
tests WIP SMS 6 months ago
.gitignore Add README, COPYING, .gitignor 13 years ago
.gitreview add .gitreview 5 years ago
COPYING Add README, COPYING, .gitignor 13 years ago Introduce APDU/TPDU trace decoder 6 months ago
csv-format pySim-prog: Use CSV format with headers 3 years ago WIP SMS 6 months ago cosmetic: Switch to consistent four-spaces indent; run autopep8 12 months ago cosmetic: Switch to consistent four-spaces indent; run autopep8 12 months ago WIP SMS 6 months ago WIP: classic SIM (3GPP TS 51.011) support. 6 months ago
pyproject.toml Introduce setuptools support 2 years ago
requirements.txt WIP SMS 6 months ago
setup.cfg Use as long description in package metadata 2 years ago tag version 1.1 of pySim 6 months ago WIP: smpp2sim 6 months ago WIP SMS 6 months ago WIP: 6 months ago

pySim - Read, Write and Browse Programmable SIM/USIM Cards

This repository contains Python programs that can be used to read, program (write) and browse certain fields/parameters on so-called programmable SIM/USIM cards.

Such SIM/USIM cards are special cards, which - unlike those issued by regular commercial operators - come with the kind of keys that allow you to write the files/fields that normally only an operator can program.

This is useful particularly if you are running your own cellular network, and want to issue your own SIM/USIM cards for that network.

Homepage and Manual

Please visit the official homepage for usage instructions, manual and examples. The user manual can also be built locally from this source code by cd docs && make html latexpdf for HTML and PDF format, respectively.

Git Repository

You can clone from the official Osmocom git repository using

git clone git://

There is a cgit interface at


Please install the following dependencies:

  • pyscard
  • serial
  • pytlv
  • cmd2 >= 1.3.0 but < 2.0.0
  • jsonpath-ng
  • construct
  • bidict
  • gsm0338

Example for Debian:

apt-get install python3-pyscard python3-serial python3-pip python3-yaml python3-termcolor python3-colorlog
pip3 install -r requirements.txt

After installing all dependencies, the pySim applications, and may be started directly from the cloned repository.

Archlinux Package

Archlinux users may install the package python-pysim-git from the Arch User Repository (AUR). The most convenient way is the use of an AUR Helper, e.g. yay or pacaur. The following example shows the installation with yay.

# Install
yay -Sy python-pysim-git

# Uninstall
sudo pacman -Rs python-pysim-git

Mailing List

There is no separate mailing list for this project. However, discussions related to pysim-prog are happening on the mailing list, please see for subscription options and the list archive.

Please observe the Osmocom Mailing List Rules when posting.


Our coding standards are described at

We are using a gerrit-based patch review process explained at


The pySim user manual can be built from this very source code by means of sphinx (with sphinxcontrib-napoleon and sphinx-argparse). See the Makefile in the 'docs' directory.

A pre-rendered HTML user manual of the current pySim 'git master' is available from and a downloadable PDF version is published at

A slightly dated video presentation about pySim-shell can be found at

pySim-shell vs. legacy tools

While you will find a lot of online resources still describing the use of and, those tools are considered legacy by now and have by far been superseded by the much more capable pySim-shell. We strongly encourage users to adopt pySim-shell, unless they have very specific requirements like batch programming of large quantities of cards, which is about the only remaining use case for the legacy tools.