Hi,
a question that comes up from time to time is how to operate
the modem/phone function of the Pyra.
There is a solution in Debian which I learned today:
https://packages.debian.org/de/sid/phoneui-apps
It was packaged in Wheezy and is in Sid, but not in Jessie.
So I never got aware of it because I currently use Jessie.
What I don't know is if the Gemalto modems are already supported
completely (beyond the standard GSM07.07 AT commands).
I would suggest to check/try (and submit bugs).
BTW it was developed by the Opnemoko/SHR community where one
contributor is still in my team. This means bug fixes are not
very far away.
http://www.shr-project.org/trac
BR,
Nikolaus