There are suddenly several information columns at the top of Xiaomi 4. What's with the i~\ bu, \ and \ symbols?

If the touch screen of your Xiaomi mobile phone 4 fails during use, it is suggested that you can troubleshoot it in the following ways:

1. Is a charger or power supply connected? If this problem occurs when connecting the power supply, it is usually caused by unstable voltage or not using the original charging adapter. It is recommended that you use the original Xiaomi data cable and charger as much as possible when charging, and choose a stable voltage environment for charging.

2. Upgrade Xiaomi mobile phone 4 to the latest version of the system, and then calibrate the screen through the following steps:

(1) Enter the dialing interface of the mobile phone, and enter *#*#6484#*#* to enter the hardware detection mode.

(2) Slide up and down to select "Touch Screen Test".

(3) Click the menu key, and then select "Touch Screen Calibration". Follow the interface prompts, click OK, and don't touch the screen until the prompt of successful calibration appears. If the above methods fail, it is recommended that you take the machine to Xiaomi House or an authorized maintenance point nearby.

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This building contains advanced fonts.

Aliveforever: This happens when I charge it with a Nokia charger.