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Q&A | 帮助 | 幫助 Why can’t I set the wallpaper as lock screen on my phone? A: Firstly, enter the Wallpaper interface of Settings on your phone (this might vary according to different models & brands, some support setting dynamic wallpaper as lock screen, e.g. most of models of Samsung, while some do not, e.g. most of models of Huawei); then click dynamic wallpaper in this interface, enter the list of dynamic wallpaper, finally choose Wallpaper Master. Why does my wallpaper turn to blank or default after using for a period of time? A: This is because the system will automatically clean the cache, and may delete Wallpaper Master by mistake. We suggest you clean the cache regularly and uninstall those unnecessary apps. Why does my wallpaper turn to the default after restarting the phone? A: Please install Wallpaper Master in the device memory, then your device will load dynamic wallpaper automatically after starting up. Can I set lock screen an