Signal call is good! Even better is to text one another on Signal to set it up so you don't have a record of text messages saying LET'S HAVE A SECRET CALLhttps://twitter.com/KlasfeldReports/status/1151886922459074560 …
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still has to go through cell towers doesn't it?
It depends on how you're using the phone (wifi, VPN). You leave a trace of your phone talking to a Signal server, but not the counterparty.
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