Nextel i55sr User Guide

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Security Features of the i 55sr Phone

The i55sr phone comes with two levels of security protection:

•

SIM Card

•

Keypad Lock

Your phone comes with a built-in level of security protection through the use of
the SIM (Subscriber Identity Module) card. The SIM card stores all your
Phonebook information and your Nextel account identification information.
Since this information is stored on the SIM card, not in your phone itself, you
can remove the information by removing the SIM card.

The SIM card is located in the SIM Card Holder on the back of the phone,
underneath the battery. You can verify that the SIM card is in place by removing
the battery and viewing the SIM card through the SIM card cover.

See “Removing/Inserting the SIM Card” on page 15 for information on locating
the SIM card. If there is no SIM card in your phone, notify your Nextel
Authorized Representative.

NOTE: Except for making emergency calls, your phone will not

function without the SIM card.

SIM Card Personal Identification Number (PIN)

To prevent unauthorized use of your phone, your SIM card is protected by a
PIN. Each time the phone is powered on, you must enter your PIN. You can
change or disable your PIN if desired.

NOTE: Disabling your PIN enables anyone to use your phone. If you

disable your PIN, you must still keep the SIM card in the phone
to make calls.

Entering the PIN

By default, your phone is set to require you to
enter a PIN.

NOTE: Your default SIM card PIN is: 0000.

It is recommended that you
change your PIN to prevent
fraudulent use of the SIM card
(see “Changing the PIN” on page
11).