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This commit fixes two problems (found by semgrep):

  * "'foo' and 'bar' in list" is incorrect, because it's interpreted
    as "'foo' and ('bar' in list)".  Strings with a non-zero length
    evaluate to True, thus it's True if at least 'bar' is present.

  * Copy-pasted 'E-UTRAN NB-S1' checked two times.

The first condition is redundant, and the whole block can be
re-implemented using two independent 'if' statements.

Change-Id: Iceb66160cfb571db8879d3810c55d252c763d320

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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

GIT Repository

You can clone from the official libosmocore.git repository using

git clone git://

There is a cgit interface at


pysim requires:

  • pyscard
  • serial
  • pytlv (for specific card types)

Example for Debian:

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

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 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 :

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

  • one where they are generated from some minimal set :

./ -n 26C3 -c 49 -x 262 -y 42 -z <random_string_of_choice> -j <card_num>

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