ngff-cardem: M.2 modem carrier with remote SIM / tracing

Introducing the sysmocom M.2 modem carrier with remote SIM / tracing (ngff-cardem)

(Downloads: Data Sheet, Manual)

M.2 modem carrier with remote SIM / tracing

The ngff-cardem modem carrier board is a useful utility for evaluating any kind of cellular modem in the more and more popular M.2 form-factor.

M.2 form-factor modems are pretty commonly found for all cellular technologies, but particular with LTE-A and 5G modems. Contrary to their predecessor mPCIe, M.2 supports higher transmission speeds of USB 3.0 super-speed.

Key Features

The main features of the board can be described as follows:

  • on-board SAM3S controller suitable for operating SIMtrace2 tracing or cardem (remote SIM) firmware.

  • on-board switching power regulator generating the 3.3V supply voltage for the M.2 modem

  • SIM and Modem Power switchable by firmware

  • USB 2.0 high-speed and USB 3.0 super-speed signals exposed on USB 3.0 micro-B connector (microB-A cable included)

  • One 2FF (mini-SIM) slots for RUIM/CSIM/SIM/USIM.

  • M.2 PCM/I2S pins are exposed on a 2.54mm break-out header.

  • PERST, GPS_DISABLE and W_DISABLE can be configured via jumper

  • Power LED and Modem Status LED

ngff cardem block diagram


As the M.2 modem carrier adheres to the M.2 mechanical form factor and standardized pin-out, it should work with any 3042 or 3052 sized WWAN modem, irrespective of the supplier.

Open Source Hardware

The ngff-cardem was created as an OSHW (Open Source Hardware) design.

This means not only schematics are available, but also the full design files including PCB layout. Anyone may create derivative works under the terms of the Creative Commons Attribution Share-Alike (CC-BY-SA) license. For more information, see


The M.2 WWAN modem breakout board is available for direct purchase from the sysmocom webshop.

For volume orders, please inquire at

Mechanical / Electrical specification

Dimensions of PCB

100 x 90 mm


M3 Mounting Holes for spacers/stands

NGFF / m.2 Slot

3042 form factor; B key


ETSI/3GPP 2FF form factor

USB port

USB3-micro-B (modem), USB-mini-B (SAM3S)

Debug facilities

Serial Console of SAM3S on 3.3V UART (2.5mm 3-pin jack); JTAG


Power (green), Modem Status (yellow), VBUS present (green), SAM3S

Input Voltage

5 V DC (typ) on 5.5/2.5mm barrel type, , current consumption as per modem

Included Accessories

  • USB-Cables

  • Light guides, jumpers and mounts