One verification avenue that comes to mind is matching fingerprints but that would only work for those who both can afford such a high-end phone and can take ti

One verification avenue that comes to mind is matching fingerprints but that would only work for those who both can afford such a high-end phone and can take time off to go register their fingerprints with their voting office, or however that would be implemented. Maybe a future rollout like this could be done when biometrics like this are standard in cheap smartphones and biometric collection becomes a standard voluntary part of voter registration. Maybe mail-in ballots could come with QR codes but this kind of defeats the idea of a mobile-only option. Maybe we just need to accept that some voter fraud will happen like it already does (the standard for voting in-person is nothing but matching the name you tell them to a list of names, not even any ID required) and settle for something potentially exploitable like SMS's with links sent to phone numbers whose registered names/addresses correspond to a registered voter, where you then have to verify some information like past addresses or whatever. If we'd just force telecom companies to tighten up their security that would be a perfect solution, and as it is it's probably good enough using the existing rate of voter fraud as a bar. Stealing a phone number in the process of identity theft is something that happens and is easier than it should be but it still takes a while on the phone and someone making a full time job of it just to hope to catch that automated text probably wouldn't get that many, if the texts were sent at random times throughout a whole month or so.