Samsung SPH-A640ZKAAFT - Manual (Page 174)

152 Section 4A: Important Safety Information
General Precautions
There are several simple guidelines to operating your phone properly and
Speak directly into the mouthpiece.
ⅷ Avoid exposing your phone and accessories to rain or liquid spills. If
your phone does get wet, immediately turn the power off and remove
the battery.
ⅷ Although your phone is quite sturdy, it is a complex piece of
equipment and can be broken. Avoid dropping, hitting, bending, or
sitting on it.
ⅷ Any changes or modifications to your phone not expressly approved
in this document could void your warranty for this equipment and void
your authority to operate this equipment.
Note: For the best care of your phone, only Trumpet Mobile
authorized personnel should service your phone and
accessories. Failure to do so may be dangerous and void
your warranty.