Categories
IMS / VoLTE Mobile Networks RFCs & Standards SDM SIM Cards Software

SQN Sync in IMS Auth

A look at how the SQN resync procedure is performed in the IMS Authentication flows

Categories
EPC LTE Mobile Networks SDM SIM Cards

PS Data Off

How turning mobile data off, doesn’t, in LTE and 5G.

Categories
5G SA EPC EUTRAN LTE Mobile Networks RFCs & Standards SDM Security SIM Cards

The PLMN Problem for Private LTE / 5G

As the number of Private Networks built on LTE and 5G grow, how will PLMN allocation be managed?

Categories
Mobile Networks Security SIM Cards

SIM Card Sniffing with Wireshark

Using Wireshark to sniff communication between your computer and Smart Card / SIM Card

Categories
Mobile Networks Python SIM Cards

SIM / Smart Card Deep Dive – Part 4 – Interacting with Cards IRL

Sending commands/APDUs to a real life Smart Card.

Categories
5G SA GSM LTE Mobile Networks RFCs & Standards SDM Security SIM Cards

Confidentiality Algorithms in 3GPP Networks: MILENAGE, XOR & Comp128

A look at the Confidentiality Algorithms used in 3GPP Networks, MILENAGE, XOR & Comp128

Categories
GSM LTE Mobile Networks Security SIM Cards

SIM / Smart Card Deep Dive – Part 3 – APDUs and Hello Card

A look at APDUs and Interacting with Cards

Categories
GSM LTE Mobile Networks Security SIM Cards

SIM / Smart Card Deep Dive – Part 2 – Meet & Greet

The basics of Smart Cards & their File System

Categories
GSM LTE Mobile Networks Security SIM Cards

SIM / Smart Card Deep Dive – Part 1 – Introduction to Smart Cards

Getting up close and personal with Smart Card / SIM Cards

Categories
SIM Cards

SIMtrace Cases

I put together some laser cut case designs for the Osmocom SIMtrace, Quite happy with the results. If you want to cut your own, I’ve sent the DXF files to the mailing list, and will try and add to the project. Also uploaded here as seems some folks had issues getting them from the mailing […]

Categories
5G SA Mobile Networks SDM Security SIM Cards

5G Subscriber Identifiers – SUCI & SUPI

Acronyms and cryptography – a look at Subscriber Identifiers in 5G

Categories
Mobile Networks Security SIM Cards

SIM Unlock Shims

What do Unlock SIMs sold online actually do and how do they do it?

Categories
EPC EUTRAN LTE Mobile Networks SDM SIM Cards

BaiCells USIM PLMN Issues (MNC 314 / MCC 030 vs MNC 311 / MCC 98)

Why the BaiCells PLMN changes?

Categories
GSM Mobile Networks RF SDM Security SIM Cards

16 in 1 Magic SIM Card Revisited

Quick look at cheap “Magic SIM Cards”, what they do, how they do it, and the amazing graphics they use.

Categories
EPC EUTRAN IMS / VoLTE Kamailio LTE Mobile Networks RFCs & Standards SDM SIM Cards VoIP

Things I wish I knew about setting up private VoLTE Networks

Lessons learned about setting up VoLTE / IMS Networks at small scale.

Categories
EPC EUTRAN LTE Mobile Networks Python RFCs & Standards SDM SIM Cards Software

PLMN Identifier Calculation (MCC & MNC to PLMN)

How to encode and decode MCC and MNC as PLMN Identifiers

Categories
EPC EUTRAN GSM LTE Mobile Networks RFCs & Standards SDM Security SIM Cards

Querying Auth Credentials from USIM/SIM cards

Using osmo-sim-auth to query USIM/SIM cards authentication mechanism.

Categories
EPC EUTRAN LTE Mobile Networks RF SDM Security SIM Cards

HSS & USIM Authentication in LTE/NR (4G & 5G)

Exploring the how and why of Authentication in LTE & NR networks.

Categories
EPC EUTRAN IMS / VoLTE LTE Mobile Networks SDM Security SIM Cards

Roll your own USIMs for Private LTE Networks

Adventures in getting USIMs to use on private LTE networks.

Categories
EPC EUTRAN GSM IMS / VoLTE LTE Mobile Networks SIM Cards Software

Building Android APN / Carrier Config

How Android OS autoprovisions APN settings and how to set your own for your unique MCC & MNC.