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README.md update / re-wording

Let's give a better description of what the project is all about, and
differentiate reading/exploring any SIM from writing/updating a special
programmable one where you know the ADM credentials.

Change-Id: Ied2a9626594e9735d92d4eabe6c6b90f92aa2909
---
M README.md
1 file changed, 21 insertions(+), 8 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/pysim refs/changes/40/39040/1
diff --git a/README.md b/README.md
index 2c7a6c8..81abe57 100644
--- a/README.md
+++ b/README.md
@@ -1,16 +1,29 @@
-pySim - Read, Write and Browse Programmable SIM/USIM/ISIM/HPSIM Cards
-=====================================================================
+pySim - Tools for reading, decoding, browsing SIM/USIM/ISIM/HPSIM/eUICC Cards
+=============================================================================

-This repository contains a number of Python programs that can be used
-to read, program (write) and browse all fields/parameters/files on
-SIM/USIM/ISIM/HPSIM cards used in 3GPP cellular networks from 2G to 5G.
+This repository contains a number of Python programs related to working with
+subscriber identity modules of cellular networks, including but not limited
+to SIM, UICC, USIM, ISIM, HPSIMs and eUICCs.
+
+* `pySim-shell.py` can be used to interactively explore, read and decode contents
+ of any of the supported card models / card applications. Furthermore, if
+ you have the credentials to your card (ADM PIN), you can also write to the card,
+ i.e. edit its contents.
+* `pySim-read.py` and `pySim-prog.py` are _legacy_ tools for batch programming
+ some very common parameters to an entire batch of programmable cards
+* `pySim-trace.py` is a tool to do an in-depth decode of SIM card protocol traces
+ such as those obtained by [Osmocom SIMtrace2](https://osmocom.org/projects/simtrace2/wiki)
+ or [osmo-qcdiag](https://osmocom.org/projects/osmo-qcdiag/wiki).
+* `osmo-smdpp.py` is a proof-of-concept GSMA SGP.22 Consumer eSIM SM-DP+ for lab/research
+* there are more related tools, particularly in the `contrib` directory.

Note that the access control configuration of normal production cards
issue by operators will restrict significantly which files a normal
user can read, and particularly write to.

The full functionality of pySim hence can only be used with on so-called
-programmable SIM/USIM/ISIM/HPSIM cards.
+programmable SIM/USIM/ISIM/HPSIM cards, such as the various
+[sysmocom programmable card products](https://shop.sysmocom.de/SIM/).

Such SIM/USIM/ISIM/HPSIM cards are special cards, which - unlike those
issued by regular commercial operators - come with the kind of keys that
@@ -49,9 +62,9 @@
----------------------------

While you will find a lot of online resources still describing the use of
-pySim-prog.py and pySim-read.py, those tools are considered legacy by
+`pySim-prog.py` and `pySim-read.py`, 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
+`pySim-shell.py`. 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.

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Gerrit-MessageType: newchange
Gerrit-Project: pysim
Gerrit-Branch: master
Gerrit-Change-Id: Ied2a9626594e9735d92d4eabe6c6b90f92aa2909
Gerrit-Change-Number: 39040
Gerrit-PatchSet: 1
Gerrit-Owner: laforge <laforge@osmocom.org>