# Setup Call Blocking

The ScamShield app will only block calls from phone numbers that are suspected as scam by authorities. ScamShield **will not block calls** from known phone numbers in your contacts. Phone numbers will only be blocked by authorities if they are deemed suspicious.

To find out how to setup your call blocking permissions, please refer to the following links:

{% content-ref url="/pages/Y414ks1HWiOqAq5rJoK9" %}
[Setup call blocking on iOS](/getting-started/setup-call-blocking/setup-call-blocking-on-ios.md)
{% endcontent-ref %}

{% content-ref url="/pages/58OweFpt9wru2L48lf63" %}
[Setup call blocking on Android](/getting-started/setup-call-blocking/setup-call-blocking-on-android.md)
{% endcontent-ref %}


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