Nokia 8260 - Manual (Page 136)

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Frequently Asked Questions (FAQ)
Q. How do I find my phone’s ESN (electronic serial number)?
A. Turn your phone off. Remove the phone’s back cover, grasp the ridge at
the end of the battery with a fingernail, and lift the battery out. On the
inside of the phone, on the sticker that was beneath the battery, after
the letters ESN, your phone’s ESN appears.
Q. How can I change the contrast of my phone’s display?
A. The contrast of your phone’s display is fixed and cannot be changed.
Q. How do I clear my call timers?
A. WARNING: The clearing of call timers cannot be undone.
Press Menu 2 > 5 > 5 and when the Security code field appears, enter
your security code and press OK.