WhatsApp's reliance on phone numbers for authentication is part of the reason the app took off so fast — no username, no email, no password, no fuss. But that requirement has become a hindrance over the last few years, be it in the lack of multi-device support or the inability to quickly start chatting with someone without adding them to your phone's contacts first. There are workarounds for the latter, but nothing too straightforward. Now WhatsApp is starting to address this by adding QR codes for profiles in the latest beta.

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