Nokia 1220 User Manual page 120

Q. How do I find my phone's Model number and ESN number?
A. The model number and ESN numbers are located on a label under the
phone's battery. Turn your phone off, remove the back cover and then
remove the battery from the phone.
Q. How do I clear my call timers?
A. WARNING: The clearing of call timers cannot be undone.
Press Menu 2-5-3 (Call log > Call timers > Clear timers).
When the security code prompt appears, enter your security code
and press OK.
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