> For the complete documentation index, see [llms.txt](https://guide.scamshield.gov.sg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide.scamshield.gov.sg/resources/help-center/about-scamshield/can-i-use-scamshield-if-i-have-an-overseas-phone-number.md).

# Can I use ScamShield if I have an overseas phone number?

ScamShield is currently only effective for local Singaporean phone numbers. If you are using a foreign telco in Singapore, call blocking and SMS filtering may not work for you as foreign sender IDs are not registered by [IMDA](https://www.sgnic.sg/smsregistry/overview). We recommend using a local telecommunication provider and enabling your call blocking & SMS filtering permissions for optimum usage of the app.