Nokia 3361 - Manual (Page 127)

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Q. How do I find out the amount of space I have used in my phone’s
memory?
A. Press Names and scroll to Options.
Press Select.
Scroll to Memory status and press Select again. Your memory status
appears.
Q. How do I find my phone’s electronic serial number (ESN)?
A. Turn your phone off, remove the phone’s back cover. See “Install the
battery” for more information. The ESN number is printed on the label
under the battery.
Q. How can I change the contrast of my phone’s display?
A. Menu 4-3-5. See “Adjust screen contrast” on page 15.
Q. How do I clear my call timers?
A. WARNING: The clearing of call timers cannot be undone.
Press Menu 2-5-6 (Menu > Call log > Call timers > Clear timers).
When the security code box appears, enter your security code and
press OK.