Samsung Gear VR User Manual page 27

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The mobile device's battery runtime may become shorter than
normal when it is used with the Gear VR since VR applications
use more of the device's resources and may contribute to
battery drain.
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You may experience slow loading speed or diminished
playback quality in some circumstances, such as after
extended use (to prevent the device from overheating) or if
your carrier or Wi-Fi network is slow or out of range.
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The availability of VR-enabled content and applications and
language support may vary by region.
Health and safety warnings
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