Xiaomi, how to make a phone call and send a message?

1. Enter * # * # 64663 # * * at the dial-up to enter the following interface.

2. Select the item 1 1: Touch Screen Test.

3. Click 1 1 to display this interface. There are no optional items at this time, so you need to hold down the menu button.

4. Press and hold the menu button to select an option, and then select Touch Screen Calibration.

5. Click Start Calibration.