# How do I know call blocking is enabled on my phone?

For iOS, **Call Blocking & Identification** setting will need to be switched on for ScamShield.

For Android, ScamShield will need to be setup as **default caller ID & spam app** in the settings.

For more information, please refer to our section on [Setup Call Blocking](https://guide.scamshield.gov.sg/getting-started/setup-call-blocking).