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Huawei Phone 1. STEP

1A. Lock the applications in the background

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2A. 2. Slide down the application interface until you see a lock icon at the left upper corner. If the icon is grayed out on a certain app, it means it is unable to locked it on the background.

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3A.

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You need to set up your Huawei phone.

1. Disable battery optimization for the battery app

2. Block the app in recently used apps

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Block the app on Huawei phones in recently used apps.

When you open the recently used apps bar, drag your app down (it will lock).