> Nobody transfers video to POTS, so it hardly matters that you are unaware of such.
I should have written s/POTS/PSTN/ where 3G is a part of it. Someone could transfer 3G<->SIP/TOX, I am not so sure no one in the world does it.
> to understand that Skype is totally backdoored, and unsafe to even have on your machine
Any proprietary software is unsafe to have on my machine, any proprietary software can be backdoored, therefore one has to handle any proprietary software as an already backdoored one.
I use voice and video chat extensively, and using any option that is not Skype would cost me hundreds of dollars per month, while it costs me 50$ per year using Skype.
OMG "hundreds"? Use Betamax SIP provider (via one of its dealers) for USD 5/month, that is USD60/year. Yes, you have to pay slightly more to keep your freedoms.
Using your unknown software
if you only talk with 3 other Linux tards
Bullshit, I call to non-SIP people/businesses via Linphone via SIP via local voocall.cz provider to their cell phones for such a low price I consider it free (USD5/month for me).
Do you have any idea how expensive it is to call international numbers?
Use VoiP provider from your home country and pay only for the local call in your home country. I was calling that way from Japan in 2005.
If you really need to call arbitrary countries (I do not) use Betamax SIP provider, it provides international calls for IIRC USD 5/month.
Also, Skype is usually used for video calls,
That's an advantage I do not have to use video.
> Works on almost any IP network, without any major configuration
Just run openvpn to get IPv6 which you need anyway. I agree Linux OS has a problem it does not run Teredo automatically like MS-Windows does.
> and allow you to make free calls to many and cheap calls to many networks.
Skype is not cheap, it is 8x as expensive as local VoIP competitors.
> Please name that package? I've been looking for years.
I have good experience with Linphone and formerly Twinkle.
> And, can you talk to people who have Skype with them?
No. It is their problem when they are incompatible.