When there is no sound when using WeChat video on vivo mobile phone, it can be solved in the following ways:

First, redial after the video call;

Second, confirm whether the volume is too low to hear, and press the Volume+button to increase the volume and try;

3. Go to Settings-More Settings-Permission Management-Find the corresponding WeChat program to see if the "recording" permission is turned on;

Specific operation steps (taking vivo Y79 as an example):

1, standby desktop click setting

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2, more settings

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3. Authority management

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4. Find the WeChat program

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5. Check whether the recording permission is turned on.

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4. Go to Mobile Settings-More Settings-Applications-All-Find WeChat, click Clear Data and cache it in the storage;

Specific operation steps:

1, standby desktop click setting

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2, more settings

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3. Applications

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4. All

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5. Find WeChat

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6. storage; stock

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7. Click Clear Data and Clear Cache.

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5. Update the mobile phone system to the latest version, and enter the mobile phone settings-system upgrade detection version update.

Specific operation steps:

1, standby desktop click setting

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2. System upgrade

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3. Detect the update of the latest version

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6. Reinstall the software after uninstalling it;

7. Confirm whether the microphone of the mobile phone is blocked or cannot be used for other reasons (for example, the other party can't hear the sound). If the microphone of the mobile phone is blocked, it is recommended to take time to take the mobile phone to the vivo after-sales service center for detection and treatment. The address of vivo after-sales service center can be found in Settings-More Settings-Service Network.

Specific operation steps:

1, standby desktop click setting

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2, more settings

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3. Service outlets

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4. Choose your province and city (such as Dongguan, Guangdong).

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Note: You can call first to confirm the after-sales working hours and plan your trip reasonably.