What does "simjacking" mean?

A social engineering technique in which a person poses as the owner of a mobile phone number and convinces the provider to transfer it to a new SIM (Subscriber Identity Module) owned by the fraudster.

What is a synonym for "simjacking"?

Common synonyms include: sim swap.

Simjacking

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
A social engineering technique in which a person poses as the owner of a mobile phone number and convinces the provider to transfer it to a new SIM (Subscriber Identity Module) owned by the fraudster. uncountable
"Over the past year, we’ve seen reports of SIM-jacking, a particularly malicious attack hackers are using to assume control of victims’ digital and financial lives."

Synonyms

All synonyms

sim swap

Example

More examples

"Over the past year, we’ve seen reports of SIM-jacking, a particularly malicious attack hackers are using to assume control of victims’ digital and financial lives."

Etymology

Blend of SIM + hijacking.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.