How to adjust the sound volume of vivo Y29 after entering engineering mode

The engineering mode is tested by the engineer, it is recommended not to adjust the settings in the setting options privately, the settings in the engineering mode may cause the mobile phone to be abnormal, if this causes the hardware problem of the mobile phone, the mobile phone will no longer be able to enjoy the warranty service. The settings have been modified, and you need to go to the vivo customer service center for processing.

Service center address: Enter the vivo official website vivo**app--my--outlet query, and select the current city to get it. It is recommended to contact ** in advance before going to avoid empty running, plan the itinerary reasonably, and travel safely.

It is recommended to exit the engineering mode to avoid damage to the phone.

Method 1: You can adjust the sound volume by using the volume button.

Method 2: Go to your phone's settings.

Sound. <>

Regulate. <>

It is recommended that you do not enter the engineering mode to adjust the volume of the mobile phone, but can directly exit the engineering mode and press the volume button of the mobile phone to adjust the volume of the mobile phone.

The engineering mode is for engineers to test, we have not announced the method of entry, if you change the settings inside, caused by the hardware problems of the phone, the phone will no longer be able to enjoy the warranty service.

You can go to Settings - Sound - System Tone - Turn off the lock screen sound.

When you turn on the machine, you don't press the volume button, if it doesn't work, take it to the after-sales service to see.

What app is you operating that can't turn on the **volume?

It is recommended that you try the following methods to solve the problem:

1. Restart the phone and try to recover;

2. Check whether the network (data or wifi) signal connected to the mobile phone is stable, if it is unstable, you can change the location or time period to try again after the network signal is stable;

5. Restore all settings of the phone to try to restore, go to Settings - More Settings - Restore factory settings - Restore all settings (this operation will not erase the data in the phone);

6. If the mobile phone system is not the latest, try to upgrade the mobile phone to the latest version, you can enter Settings - System Upgrade - Check the update immediately, according to the prompts ** Upgrade package, click Verify and install, the mobile phone will restart and automatically enter the upgrade mode.