Huawei's mobile phone keeps ringing, but I don't know where it is.

Generally, when the mobile phone has a prompt tone, the notification content will appear on the top of the mobile phone. That is to say, which application to notify is prompted. You can find the notification bar in the phone settings, then click in, scroll down to the application notification, and turn off those you don't need. In other words, just turn off the blue icon and make it gray. After that, your mobile phone won't have so many tips. Just keep some things that you usually use. For example, SMS, telephone, WeChat, QQ, etc.