HTC 3125 - Manual (Page 18)

18 Getting started
1.2 Inserting the SIM Card
Your SIM (Subscriber Identity Module) card is given to you by your wireless
service provider and contains your basic subscriber information, such as your
phone number and your address book.
Before you begin, ensure that the phone is turned off.
1. Open the battery cover: Hold the phone in one hand with the front
panel facing down in the palm of your hand. With your other hand
press down on the battery cover and slide it open.
2. Insert the SIM card: Insert the SIM card into the SIM card slot with
its gold contacts facing down. When completed, replace the battery
cover.
To take the SIM card out, press the bottom of the SIM card to slide it
out of the slot. Then lightly lift up the SIM card.
Press here.
Remove the
battery cover.
Remove the
SIM card.