Learn how to cancel Call Blocker - Blacklist subscription on iPhone, Android, Paypal or directly.
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Alternative method via AppStore:
1. Help you block the phone you don't want to answer, and bring you a quiet environment. - Blacklist: You can add unwanted numbers to blacklist. - Whitelist: Add important phone numbers to your whitelist so they can always reach you.
2. Call Blocker is one of the most effective apps to prevent unwanted calls.
3. In order to avoid being killed by the system and can not be used, please add Call Blocker to the battery's Background activity manager in the system's battery management interface.