Samsung SM-X306B - Device Overheating During Use; Causes and Solutions for Overheating During Operation

Usage notices
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When the device heats up during use
When you use features or apps that require more power or use them for extended
periods, your device may temporarily heat up because of increased battery consumption.
Close any running apps and do not use the device for a while.
Refer to the following examples of situations in which the device may overheat.
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During the initial setup after purchase or when restoring data
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When downloading large files
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When using apps that require more power or using apps for extended periods
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When playing high-quality games for extended periods
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When recording videos for extended periods
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When streaming videos while using the maximum brightness setting
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When connecting to a TV
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While multitasking (or, when running many apps in the background)
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When using Multi window
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When updating or installing apps while recording videos
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When downloading large files during a video call
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When recording videos while using a navigation app
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When using large amount of data for syncing with the cloud, email, or other accounts
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When using a navigation app in a car while the device is placed in direct sunlight
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When using the Mobile Hotspot and Tethering feature
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When using the device in areas with weak signals or no reception
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When charging the battery with a damaged USB cable
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When the device’s multipurpose jack is damaged or exposed to foreign materials,
such as liquid, dust, metal powder, and pencil lead
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When you are roaming