Is VOIP the most secure and private way to make calls when I need it for Job calls? And is Home VOIP Phone Setup better than for example VOIP Apps von Android?
Should I only use my Home Router for Internet (Wifi) when I want the most Security and Privacy? And should I use Ethernet and disable Wifi for most Security and Privacy? And should I throw away my Sim-Card and my VOIP Android App, if I want the most Security and Privacy? (And just use SimpleX for Calls and E-Mail for Job communications, instead of Cellular/VOIP Calls?)