Instructions for testing ModemManager on QRTR modems

mm-tracking-guide.txt

Yeah, you can get it going in postmarketOS by using my pmaports branch here: https://gitlab.com/sdm845-mainline/pmaports/-/tree/mm-tracking

You'll need to get rid of the top commit it was just for my testing and doesn't work. 
Checkout HEAD~1 ("modemmanager: QRTR testing") and then change the modem manager APKBUILD to use this branch: https://gitlab.freedesktop.org/aleksm/ModemManager/-/tree/aleksander/qmap-settings-udev (from !501). Then:

pmbootstrap checksum modemmanager
pmbootstrap build libqrtr-glib --arch aarch64
pmbootstrap build libqmi -- arch aarch64
pmbootstrap build modemmanager -- arch aarch64

Install the built packages on to the device (they're in ~/.local/var/pmbootstrap/packages/)

Also might need to manually update /usr/lib/udev/rules.d/77-mm-qcom-soc.rules to include the changes from the branch.

To enable the SIM slot, I have to run:

sudo qmicli -p -d qrtr://0 --uim-change-provisioning-session="slot=1,activate=yes,session-type=primary-gw-provisioning,aid=<YOUR SLOT AID>"

The aid can be found with --uim-get-card-status.

Then you can run ModemManager as root and it should all appear in Phosh. Despite what phosh indicated mobile data doesn't work yet.
Sending and receiving texts does!