Do you have an old #PinePhone lying in the cupboard?
Dev versions of #ModemManager now support #GPS without a SIM card. Consumers of the MM API need some changes for this, so I submitted pull requests to #Geoclue (https://gitlab.freedesktop.org/geoclue/geoclue/-/merge_requests/173), gnss-share (https://gitlab.com/postmarketOS/gnss-share/-/merge_requests/15), and my own simple #GNSS app Satellite (https://codeberg.org/tpikonen/satellite/releases) (all 3 in different languages).
Soon it will be possible to use SIMless mobile phones for things like navigation and fitness tracking.
@tpikonen for geoclue the .conf has CDMA, and 3G enabled and wiki states modems (accuracy: in kilometers, unless modem has GPS).
What if like on a Librem 5 you have a 3G/4G/CDMA modem with GPS, but the antenna isn't plugged in? It will continuously search for and not find any GPS signal probably burning through a lot of battery.
Maybe there needs to be a DB signal check in the geoclue source daemon of some sorts, if there is no signal or bad signal compared to the GPS source then drop source
