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December 26, 2025
SIM swapMobileAuthentication

SIM swap vs number recycling: what fraud teams should know

Deepak Raj

Deepak Raj

VP Tech

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Summarize this article with

SIM swaps and number recycling both break phone-number-based trust, but they look different operationally. Treating them the same can either miss fraud or block real users.

SIM swap: rapid, high-risk change

Often correlated with takeover attempts. Treat as high risk when combined with a new device or sensitive actions.

Number recycling: slow, systemic risk

A recycled number can “inherit” trust. Device history helps prevent account recovery and OTP issues.

Related: SIM Binding.

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