Samsung Galaxy S4 Active User Manual page 23

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When drying off your device, be sure to pat the earpiece (top front
of phone), microphone (bottom of phone), and speaker (rear of
phone) with a clean, soft cloth to remove as much water as
possible.
•
When making a call immediately after your device is wet, the
microphone may have water in it which may lower the volume
that the other person will hear. After drying off the device, allow
the device to air-dry before making a call.
•
The back and multipurpose jack covers may be loosened slightly
if the device is dropped or receives an impact. Ensure that all the
covers are properly aligned and tightly closed. Otherwise, they
may not provide protection from water and dust.
•
Always keep the multipurpose jack cover clean and be careful to
avoid damaging it.
Note: The touch screen may not be active in water.
Getting Started 15