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How to enable OPPO R9 program encryption?

How to set the mobile program password: 1. For ColorOS 3.0 version, enter Settings--Fingerprint and Password--App Encryption to operate; 2. For ColorOS 2.1 version, enter Security Center--Permissions Privacy--Program Encryption; 3. For other ColorOS versions, go to Settings--Security Services--Program Encryption--SMS messages; 4. For other versions, go to Security Center--Program Encryption--Encrypt program to select information.