I used to use an app from the Play Store to based on prefix but it stopped working with Android P (API level 28 now requires system permission MODIFY_PHONE_STATE to block calls), so I decided to build my own Android P-compliant call blocker app.
aliakbarrashidi / android-call-blocker Goto Github PK
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Android P-compliant call blocker with prefix support
License: Apache License 2.0