linphone, still free?

[Runciter]

Hello FSD volunteers,

The software Linphone is listed in the FSD as a high priority free
software project, verified in 2002. I probably don't have the expertise
to do it myself and I found nothing fully conclusive without the shadow
of a doubt, but you guys might want to check again if you consider the
software still free as of its recent versions.

Here's what I gathered a couple of weeks ago by trying linphone:

1) On Android and Guix, the graphical UI asks the user to check a box
signifying the user accepts some "Terms and Conditions". Interestingly,
although that may be just an incorrectness of the interface, the user
needs to accept those Terms before he can setup any kind SIP account, be
it to create an account with Linphone themselves, or to setup linphone
to work using an existing account with any other SIP provider.

2) F-Droid claims and warns users that the software has an anti-feature:
"part of the upstream source code is not free."

3) A few days ago I went quickly to the website of Linphone, which is
now edited by a company Belledone Communications (this has changed since
2002), and I paraphrase from memory: the website advertises that
Linphone is open source but can be licensed as proprietary for
enterprise client should they wish, because Belledone enacts a
double-license mechanism.

Normally the third and last point in itself would not be a red flag,
however what about the first two? I was thinking this might be worth a
new verification for the FSD.

Personally, since I tried to setup linphone and it did not work for me,
probably because of geographical restrictions, there is not any kind of
urgency for me to know exactly if it is still free software or
not... I'm probably not going to try again anytime soon.