Linphone package is of outdated not properly functioning version

[Karl Kastner]

The current linphone release is 4.2.5, yet the default package in ubuntu 20.04 is merely 3.12.

The version 3.12 is outdated. It has been discontinued and is also not working properly,
for example, the wizard fails to create/store sip account settings, clicking the call button does nothing, not even an error message is displayed, c.f. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=948227

Please either replace the linphone version with a more recent properly working one, or remove linphone from the repository so that users can download it from https://www.linphone.org/releases/linux/app/ right away.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linphone 3.12.0-3.1
Uname: Linux 5.8.0-050800-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.17
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu May 13 12:49:53 2021
InstallationDate: Installed on 2015-11-05 (2016 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
SourcePackage: linphone
UpgradeStatus: Upgraded to focal on 2020-09-10 (245 days ago)
modified.conffile..etc.apport.crashdb.conf: [modified]
mtime.conffile..etc.apport.crashdb.conf: 2019-03-07T14:28:39.455024