Cellular Modem Diagnostics (Network & Wire Protocols): open-source projects that exist because someone reverse engineered a closed product, sorted by GitHub stars.
Capture 2G/3G/4G signaling from your own Qualcomm phone or modem via the DIAG protocol
Full-system emulation of Samsung Shannon and MediaTek baseband firmware
Signaling collection from Qualcomm and Samsung Shannon modem diagnostic interfaces
Reverse-engineered Linux driver for the Intel XMM7360 (Fibocom L850-GL) LTE modem
Scripts for reverse engineering the Samsung Shannon baseband firmware
Notes and tools for reverse engineering the MediaTek LTE baseband and Coresonic DSP
Emergency USB boot loader for Huawei Balong V7 modems
Flasher for Huawei modems on the Balong V7 chipset
Scripts, Ghidra loaders and notes for Samsung's Shannon baseband
Tools for the Fibocom L850-GL / Intel XMM7360 LTE modem on Linux
Parses Qualcomm and MediaTek modem diagnostic logs on your own device
IDA Pro loader for Exynos/Shannon baseband modem firmware images
MediaTek baseband processor firmware tools
Debug message monitor for Qualcomm cellular modems
Wireshark dissector for Apple's ARI protocol between iPhone and Intel basebands
GUI to flash Huawei modems/routers and edit their firmware files
Parses Qualcomm DIAG logs and converts them to GSMTAP
Debugger for the Samsung Shannon baseband firmware
Samsung modem AT commands over USB serial and secret dialer codes extracted from system packages
Dynamic analysis environment for Samsung's Shannon baseband (predecessor of FirmWire)
Library using the Qualcomm DIAG port for band and frequency locking on your own device
Osmocom tools for the Qualcomm DIAG interface
Obtains GSMTAP SIM and GSM messages from Nokia DCT3 phones
Reverse-engineered FOSS implementation of IMS (VoLTE) services for Linux phones
Library for the Qualcomm MSM Interface (QMI) modem protocol
Library for the Qualcomm IPC Router (QRTR) protocol