What should I do if there is no prompt sound when Huawei Mobile Phone 6X locks the screen?

First open "Settings". Click "Notification Center" > "Notification Bar and Status Bar" > and select the app for which you want to set the notification method.

Huawei was officially registered in Shenzhen, China in 1987. Huawei's products and solutions have been used in more than 170 countries around the world, serving 45 of the world's top 50 operators and one-third of the world's population. In 2014, Fortune Global 500 ranked Huawei 285th in the world, up 30 places compared with the previous year. In 2015, it was named Outstanding Enterprise of the Year in Sina Technology's 2014 Annual Billboard.

In the first quarter of 2017, in the service provider router and carrier-grade Ethernet switch markets, Huawei for the first time surpassed Cisco, which has long dominated the world's core router market, and occupied the world's largest share of the core router market.