alt Hacker NewsAnything else could be lost. I can always get new SIM card for this number. I don't need to backup it and I can't accidentally delete it. That's the biggest reason for me to link phone number everywhere. I'd hate to lose access to my GitHub account.
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It's also not very hard for scammers to get a SIM card for your number, unless you're using a carrier that specializes in not allowing SIM swapping attacks.
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I don't see how I could simultaneously lose my three hardware keys (laptop, phone and Yubikey) and backup codes.