Samsung SCH-N330PWMXAR - Manual (Page 20)

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Section 2
3. Once the phone is on, you can use the keypad to make
and answer calls, to access the menu options of your
phone, and to personalize it to fit your needs.
4. To retract the display, gently push the top of the display
down until it locks in place.
Internal Antenna
Avoid touching the internal antenna area at the upper rear
of your phone while it is powered up. Contact with the
internal antenna area affects the quality of your calls and
may cause the phone to operate at a higher power level
than necessary.