173. SIM Card3.1 SIM CardWhen you subscribe to your network operator, you will get a SIM(Subscriber Identity Module) card containing your registration information.(PIN), the existence of additional service, etc.Like a credit card, it should be kept securely and handled carefully.Do not bend, scratch or expose it to moisture.Avoid static electricity.To avoid memory corruption of your SIM card, always switch off yourphone before removing or inserting your SIM card.3.2 Installing/Removing the SIM card1. Remove the battery from the unit.2. If the SIM slot is empty, insert the SIM card into the slot.3. If you want to remove the SIM card, push the SIM card in the arrowdirection as shown in the picture.