In a dimly lit environment, the camera will recognize the surrounding light and perform image processing, when the phone moves, the preview interface will appear slightly stuck, but in a better-lit environment, it's not easy to appear.

Using the phone during charging will intensify the heat generated by the phone, especially when running applications such as games what consume a lot of power. To prevent high temperatures from affecting the use of the phone, the built-in overheating protection function of the mobile phone will reduce part of the performance of the mobile phone to reduce heat generation, so it may lead to lagging.  When charging, it is recommended to use the phone as little as possible.

The best working environment temperature of the built-in lithium battery in the mobile phone is 0°C~35°C, when the phone is on the place where below 0°C, the battery activity becomes poor, it will lead to a decrease in the battery charge and discharge performance, then the phone will identify to the batteries or power is extremely low, which will trigger the battery protection mechanism to make the phone turn off automatically. Therefore, when the mobile phone works at a lower ambient temperature, it may automatically shut down or not turn on. It is recommended to move the mobile phone to an indoor room temperature environment for observation.

If your phone is down, you can try a forced reboot. The forced reboot will not erase your phone's data, so press and hold the power button for 12 seconds or more time until your phone reboots.

When the battery is low, the phone will automatically adjust to reduce partial performance in order to protect and extend the battery life, and some APP with high performance requirements may lag. It is recommended that you keep your mobile phone charged in time to keep it fully charged.