How does ZTE Xiaoxian 4 lock the screen?

After marinating, after you set the sleep time in the phone settings-All-Display-Sleep, the phone will automatically lock the screen at the sleep time, or you can directly click the power button to lock the screen. If you mean that the screen can't be touched by the fixed screen, I suggest you go to phone settings-All-Security-Screen fixed (turned on) and observe the use; Welcome to use the built-in ZTE customer service APP, service outlets, maintenance progress, reservation service, maintenance service, authenticity detection and so on. No matter when and where, the service is at your fingertips! Wish you a happy life!