Advanced, optional
The radio module in these phones runs its own firmware. SignalDeck has an optional loader for it, under Device. The factory image is kept as a backup, and several safety checks run before anything is written.
You never need to change the module firmware to use SignalDeck.
Some features need the modified SignalDeck module firmware, such as M17 transmit. It is not available for every phone. Install images only from inside the app, which checks them first.
Catalogue · serial 5
No modified images are released yet. The catalogue holds the stock images below, so a module can be put back the way it shipped.
The firmware this phone shipped with. Loading it puts the module back the way it was. The image stays until another one is loaded, including across a reboot.
The module firmware file an Atom XL keeps on its vendor partition for the stock app's updater. It is an older build than the V082 the phone's module reports, so it is kept for research and is not offered as a restore image.
The catalogue is signed, and the app checks the signature and each image's checksum before it writes anything. To check them yourself, follow the steps in the firmware project.