I keep getting bot calls a lot lately, which makes me rethink about the technology VOIP. The pain point here is that, like email, a person can be reached as long as I know the phone num. This eliminates the process of verification. Unlike VOIP, a regular chat app can provide some kind of verification barrier. So does it mean a chat app, in theory, is based on a simpler and spam-proof architecture can ultimately the better version of regular phone call.
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