Sanyo MM-8300 User Manual page 307

Maintaining Your Phone's Peak Performance
There are several simple guidelines to operating your phone properly and
maintaining safe, satisfactory service.
Hold the phone with the antenna raised, fully-extended, and over your
shoulder.
Try not to hold, bend, or twist the phone's antenna.
Don't use the phone if the antenna is damaged.
Speak directly into the mouthpiece.
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.
Note:
For the best care of your phone, only Sprint authorized personnel should service
your phone and accessories. Faulty service may void the warranty.
Section 4A: Safety 297