Your phone is listening to your conversations! Engineers have tested: Turning off these 3 switches can block 99% of eavesdropping.

Here is a comprehensive solution for protecting against phone eavesdropping, combining engineers' test recommendations and security enhancement measures, with step-by-step guidance:

I. Core Defense Measures (Block 99% Eavesdropping)

1. Turn off User Experience Improvement Program

Settings → System and Updates → User Experience Improvement Program → Uncheck

(This feature continuously uploads user operation data to the manufacturer's server)

2. Disable Personalized Ad Tracking

WeChat Settings → Personal Information and Permissions → Personalized Ad Management → Turn off the switch

(Prevents chat keywords from triggering precise ad pushes, needs to be reset every six months)

3. Cut off App Listening Permissions

Settings → Apps and Services → Permissions Management → Microphone → Turn off unnecessary app permissions

(Especially turn off microphone permissions for e-commerce, social, and input method apps)

II. Deep Security Reinforcement

1. Intercept Malicious Data Collection

Call Protection: Dial Interface → Harassment Interception → Enable Fraud/Ad Call Interception

SMS Filtering: Message Settings → Enable Malicious URL Identification & Verification Code Security Protection

2. Location Information Protection

Settings → Location Services → Turn off Camera Precise Location + System Services' "Significant Locations" (to avoid linking photo/chat location information)

III. Engineer's Special Tips

1. Eavesdropping Technology Principle

Keyword Trigger: When words like "travel" or "buying a house" appear in conversations, the system automatically marks user profiles

Cross-App Association: Shopping apps obtain chat keywords through input methods (need to turn off input method network permissions)

2. High-Risk Scenarios

1. 10:00-12:00 AM System high-frequency data upload → Recommended to close non-essential apps during this time

2. First launch after new app installation → Immediately enter permission settings to turn off microphone/contacts

❗ Precautions

1. Be cautious with public WiFi: Free networks in malls/airports may hijack unencrypted communications.

2. Regularly clean up permissions: Check app permission usage records once a month (Settings → Privacy → Permission Access Records).

3. Ultimate physical protection solution: Use an anti-eavesdropping phone case during calls (the metal shielding layer can block signals).

Tests show that after turning off the above three switches, ad relevance drops by 76%, and unsolicited sales calls decrease by 83%. It is recommended to review settings every three months, as some permissions may automatically reset after system updates.