The 20-minute SIM-swap lockdown: a carrier PIN blocks 90% of attacks
JafarNajafov · x · 2026-10-02
The author warns that your phone number is the backdoor to everything: a single SIM-swap can drain crypto wallets, bank accounts, 2FA codes, WhatsApp business, and email recovery.
The core defense takes 5 minutes: call your carrier and add a port-out PIN or number lock.
- T-Mobile: Account Takeover Protection
- Verizon: Number Lock
- AT&T: Wireless Account Lock
No PIN, no transfer — which the author says instantly blocks about 90% of SIM-swap attacks.
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