Operating on GSM networks, the Viewsonic ViewPhone 4s requires a Subscriber Identity Module to uniquely identify the phone. A Subscriber Identity Module (SIM) card is a portable memory chip used mostly in cell phones that operate on the Global System for Mobile Communications (GSM) network. These cards hold the personal information of the account holder, including his or her phone number, address book, text messages, and other data.
Read on to learn how to Insert a SIM Card in Viewsonic ViewPhone 4s,
1.Carefully push the SIM card out of the wallet-sized plastic card carrier.
2.Turn your Viewsonic ViewPhone 4s off.
3.Grasp the notch at the top of the back panel and pull away from the Viewsonic ViewPhone 4s to remove the back cover.
4.You’ll see a notch at the top of the battery.Use it to lift the battery out of the Viewsonic ViewPhone 4s.
5. Your SIM card has one corner missing.Slide the SIM card into the SIM slot so that the corners match.Ensure that the gold contacts are facing downwards.You will hear a click.
6. Reinstall the battery and back cover and then power up the Viewsonic ViewPhone 4s.
When a user wants to change phones, he or she can usually easily remove the card from one handset and insert it into another. SIM cards are convenient and popular with many users, and a key part of developing cell phone technology.