LinPhone is free and open source. Express BLOWS. Based out of CO but has a Britain LLC title. My favorite part of express was they monitor and then choke ANY torrenting. ****e company. Avoid at all cost.
http://www.linphone.org/
The obvious reason why phone support is failing is that so many companies have hired gupta and friends and so it's actually hard to get any real support. Any you can understand. Coders my friend. Mars needs coders. Coders is code for any idiot who can barely type but takes directions well.
With a payed sip acct., and a sip smartphone ap, anyone can make and take calls through the sip. If both are on a sip the calls can be fully encrypted too.
There's signal and telegram but they are like an ecosystem to their own. A sip can touch the world. I'm almost at the point where a payed sip acct. looks better than the cellular nonsense I deal with now. Meaning get a smartphone wherein the sim is the sip. Skippping the verizon, att, blah blah blah nonsense altogether. I only pay about $11.50/month now so I can't complain too much. IMO, all communications should be free. Impossible when they would rather worry about what you are allowed to say or even stupider what words you can use. See my point. As long as we rely on them getting payed for OUR comms, they will continue to charge while then telling us what we are allowed to do. Funny how it works that way but that's EXACTLY how it works. Remove the money, remove any restrictions by others.
As for searches?
https://searx.neocities.org/
https://searx.info/
https://searx.space/ be careful which url you use as they are country and network specific
https://swisscows.com/
startpage, duckduckgo