pySim-prog - Utility for programmable SIM/USIM-Cards

This repository contains a Python-language program that can be used to program (write) 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.


The official homepage of the project is http://osmocom.org/projects/pysim/wiki

GIT Repository

You can clone from the official libosmocore.git repository using

git clone git://git.osmocom.org/pysim.git

There is a cgit interface at http://git.osmocom.org/pysim/


pysim requires:

  • pyscard
  • serial
  • pytlv (for specific card types)
  • cmd2 (for pySim-shell.py)

Example for Debian:

apt-get install python3-pyscard python3-serial python3-cmd2 python3-pip python3-yaml
pip3 install pytlv

Alternatively, everything can be installed using pip:

pip3 install -r requirements.txt

Mailing List

There is no separate mailing list for this project. However, discussions related to pysim-prog are happening on the openbsc@lists.osmocom.org mailing list, please see https://lists.osmocom.org/mailman/listinfo/openbsc for subscription options and the list archive.

Please observe the Osmocom Mailing List Rules when posting.


Our coding standards are described at https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards

We are currently accepting patches by e-mail to the above-mentioned mailing list.


  • Program customizable SIMs. Two modes are possible:

  • one where you specify every parameter manually :

./pySim-prog.py -n 26C3 -c 49 -x 262 -y 42 -i -s

  • one where they are generated from some minimal set :

./pySim-prog.py -n 26C3 -c 49 -x 262 -y 42 -z -j

With <random_string_of_choice> and <card_num>, the soft will generate
'predictable' IMSI and ICCID, so make sure you choose them so as not to
conflict with anyone. (for eg. your name as <random_string_of_choice> and
0 1 2 ... for <card num>).

You also need to enter some parameters to select the device : -t TYPE : type of card (supersim, magicsim, fakemagicsim or try 'auto') -d DEV : Serial port device (default /dev/ttyUSB0) -b BAUD : Baudrate (default 9600)

  • Interact with SIMs from a python interactive shell (ipython for eg :)

from pySim.transport.serial import SerialSimLink from pySim.commands import SimCardCommands

sl = SerialSimLink(device='/dev/ttyUSB0', baudrate=9600) sc = SimCardCommands(sl)


# Print IMSI

print(sc.read_binary(['3f00', '7f20', '6f07']))

# Run A3/A8