Modem Authenticator is a background C++ service that unlocks FCC restrictions on WWAN/modem modules. It is fully STRICT-confined (no --classic, no manual AppArmor tweaks) and Snap-Store publishable.
Event-driven design (no polling, no custom AppArmor, idle = zero CPU):
unlock oneshot service, which performs the FCC unlock and
exits. (Old-kernel mhi_bus PCIe nodes are covered by a commented rule.)systemd D-Bus interface, so this layer
degrades gracefully; startup + udev still cover the realistic triggers.The unlock itself is sent via mbimcli directly to the device node (covered by the modem-manager plug). The FCC unlock key is HARDCODED in the binary (not externalised to a config file), overridable at runtime with -k.
A CLI tool (fccunlocker) is also provided for manual operation.
TEST BUILD (2026-08-13): published to practice the Snap Store workflow. Dell RW135/RW151 models use placeholder unlock keys in this release and are not yet supported.
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Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Snap can be installed from the command line. Open the Konsole terminal and enter the following:
sudo apt update
sudo apt install snapd
To install Modem Authenticator, simply use the following command:
sudo snap install modem-authenticator-test --edge
Browse and find snaps from the convenience of your desktop using the snap store snap.
Interested to find out more about snaps? Want to publish your own application? Visit snapcraft.io now.