@arubislander Thank you very much for this input. So basically create a libertine container and activate softwares (such as libreoffice) to communicate to printer network. As I’m newbie I’m not sure I have the technical knowledge yet to use libertine, but will definitely keep those instructions to do it later on.
Yes, correct, Linphone should work, but needs a SIP account. Wifi calling enables automatic handover of calls (incoming/outcoming) though any wifi network (when mobile provider offers this features, which is mostly the case now). This is particulary advantageous to call from abroad (no roaming fees), as well as in case of poor coverage signal.