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.
Thank you for your report. Information you provided will help us investigate further.
There was an error while sending your report. Please try again later.
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.
On Arch Linux, snap can be installed from the Arch User Repository (AUR). The manual build process is the Arch-supported install method for AUR packages, and you’ll need the prerequisites installed before you can install any AUR package. You can then install snap with the following:
git clone https://aur.archlinux.org/snapd.git
cd snapd
makepkg -si
Once installed, the systemd unit that manages the main snap communication socket needs to be enabled:
sudo systemctl enable --now snapd.socket
If AppArmor is enabled in your system, enable the service which loads AppArmor profiles for snaps:
sudo systemctl enable --now snapd.apparmor.service
To enable classic snap support, enter the following to create a symbolic link between /var/lib/snapd/snap and /snap:
sudo ln -s /var/lib/snapd/snap /snap
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
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.