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What Is a VoIP Phone Number: How It Works and Why Verification Codes Often Fail
A VoIP phone number is tied to a cloud account, not a SIM card or phone line; this article explains how a VoIP call goes from signaling and encoding to gateway interconnection, why platforms query line type before sending verification codes and may block VoIP numbers, and which number to choose for calling, one-time verification, or long-term repeated code reception.
