User's Manual

Introduction
9
SIM Card Installation
You must install a SIM card to use the phone functions of your H-21.
Perform the following procedures to install the SIM card.
NOTE: Power off the device and remove the battery before inserting a SIM
card. Make sure the SIM card snaps correctly into the SIM socket.
Removing the Battery Cover
CAUTION! Make sure the device is turned off before you attempt
to remove the battery cover. Otherwise the device will shut off
automatically and unsaved data may be lost.
A
B
STEP 1:
Use the tip of the stylus to perform the following
procedures. Do not use excessive force.
• First slide the Lock Release to the unlock
position (A).
• Then turn the Lock Button to the unlock
position (B).
NOTE: The battery cover locks will only unlock
in this order.