Joke Collection Website - Blessing messages - What happened to the sudden drop in the sound of Lenovo k9 10 mobile phone?

What happened to the sudden drop in the sound of Lenovo k9 10 mobile phone?

A, if it happens in the process of talking with individual contacts, it does not rule out the problem of the other party's mobile phone. It is recommended that you compare the call with other contacts and observe their usage;

B. If all contacts talk like this, please refer to the following methods to check and confirm:

1. During the call, you can adjust the volume through the volume button. It is recommended that you try to use the "Volume+"button to adjust.

2. Please check and confirm whether the receiver is covered properly. It is recommended to remove the membrane or replace it for testing.

3. If it doesn't work, it is recommended to restore the factory settings of the backup data as much as possible (please pay attention to the backup of the text contacts and text messages, otherwise there is a risk of loss.