Why is there no sound on Xiaomi 4 mobile phone?

There is something wrong with the system.

Solution 1. Open the settings, select sound and vibration, check whether mute mode is on, and then select off.

2. Back up the data in advance (create a new backup by opening Xiaomi's own cloud service. ) Enter recovery mode, clear cache, clear user data and clear all data. When restoring the backup, do not restore the settings and third-party security software in the mobile phone. Try to use it normally.

At the press conference of operating system 8 16, Lei Jun also announced the official Chinese name of MIUI (Mi You). Xiaomi mobile phone 2 adopts MIUI V4 operating system based on Android 4. 1 deep development. Mi You V4 has carried out hundreds of optimizations and improvements for China users' habits, with better user experience, smoother software operation and more stable operation foundation.

In addition, MIUI V4 provides nearly 10,000 sets of desktop theme downloads, and the ever-changing screen lock allows smartphones to avoid "one thousand machines".

MIUI V4 of Xiaomi Mobile Phone 2 also added a free desktop, which broke the conventional icon arrangement on the desktop and introduced "scenes" into the mobile phone screen.

Swipe with two fingers to switch between the traditional desktop and the free desktop. This scene may be a real study, and the furnishings in the room and on the desktop are all APP；; It may also be the game interface of Angry Birds, and each bird is a specific APP. Among them, the placement of icons completely conforms to the settings of the scene, and users can set them according to their own preferences.