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You don't need a smartphone to have and use a phone number. I suspect the OP is about smartphone app authentication.
by cassianoleal 4y ago
You don't need a smartphone to have and use a phone number. I suspect the OP is about smartphone app authentication.
- lotsofpulp 4y agoOh, yes, I think I misread. In that case, I guess the spam/bot reduction efforts are outsourced to Apple and Google’s App Store and mobile OSs.