Samsung SM-S901E/DS User Manual page 14

Getting started
When using the speakers, such as when playing media files or using
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speakerphone, do not place the device close to your ears.
Be careful not to expose the camera lens to a strong light source, such as direct
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sunlight. If the camera lens is exposed to a strong light source, such as direct
sunlight, the camera image sensor may be damaged. A damaged image sensor is
irreparable and will cause dots or spots in pictures.
If you use the device with its glass or acrylic body broken, there may be a risk
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of injury. Use the device only after it has been repaired at a Samsung Service
Centre.
If dust or foreign materials enter the microphone, speaker, or receiver, the
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device's sound may become quiet or certain features may not work. If you
attempt to remove the dust or foreign materials with a sharp object, the device
may be damaged and its appearance may be affected.
Connectivity problems and battery drain may occur in the following situations:
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‒ If you attach metallic stickers on the antenna area of the device
‒ If you attach a device cover made with metallic material to the device
‒ If you cover the device's antenna area with your hands or other objects while
using certain features, such as calls or the mobile data connection
If the area around the rear camera is covered with accessories, such as a
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protective film or stickers, unwanted noises may occur during calls or media
playback. (Galaxy S22 Ultra, Galaxy S22+, Galaxy S22, Galaxy S21 FE 5G)
If the area around the upper microphone is covered with accessories, such as
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a protective film or stickers, unwanted noises may occur during calls or media
playback. (Galaxy S21 Ultra 5G, Galaxy S21+ 5G, Galaxy S21 5G)
Using a Samsung-approved screen protector is recommended. Unapproved
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screen protectors may cause the sensors to malfunction. (Galaxy S21 Ultra 5G,
Galaxy S21+ 5G, Galaxy S21 5G)
Do not cover the proximity/light sensor area with accessories, such as stickers or
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a cover. Doing so may cause the sensor to malfunction.
The light may flicker at the top of the device during calls due to proximity sensor
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operation.
The colours on the Edge screen may look different depending on your viewing
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position. (Galaxy S22 Ultra, Galaxy S21 Ultra 5G)
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