The tru.ID SIMCheck API provides information on when a SIM card associated with a mobile phone number last changed. GuideSIMCheck Quick Start →Make your first SIMCheck API call in minutesGuideSIMCheck Workflow →Read the guide on how use the SIMCheckAPIReferenceSIMCheck API Reference →Explore the SIMCheck APIReferencetru.ID CLI Reference →Find out more about the tru.ID Command Line Interface (CLI)