Ussd Code To Block All Incoming Calls Android -

Note: Most standard USSD codes cannot directly block all incoming calls on Android devices, as call blocking typically requires network-level or device-level settings. However, some mobile carriers support service-based call barring using USSD commands.

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Replace PIN with your carrier’s barring password (default is often 0000 or 1234 ; contact your carrier if unknown). ussd code to block all incoming calls android