The SIM card of an iPhone 4 is a memory card that stores contact and phone data. Transfer the SIM card from an old iPhone to a new iPhone by opening the SIM card tray and replacing the card.Know More
Power off the iPhone 4 by holding the button on top of the phone and the home button at the same time for between 15 and 30 seconds. Swipe to turn off the power when directed to do so.
Hold iPhone so that you can see the bottom of the phone. Insert the end of a paper clip into the small hole on the bottom of the phone, and firmly press until the SIM card tray pops out.
Pull out the SIM card tray, and place the SIM card in it, aligning it with the edges of the tray. The writing on the SIM card should face up.
Hold the tray above its slot on the bottom of your phone, and push in until you hear it snap into place. Turn the phone right-side up to make sure that the SIM card tray doesn't fall out.
If a cell phone user receives a message that their SIM card registration failed, it means that either their cell phone service is not activated or that the SIM card is not correctly installed in the phone. It is also possible that the SIM card is defective.Full Answer >
The error message "SIM card registration failed" indicates that the phone is having trouble reading the electronic information encoded on the SIM card. This problem is often simple to solve.Full Answer >
A Verizon phone without a SIM card cannot be used on another network. This is because Verizon operates using CDMA technology.Full Answer >
If a cell phone doesn't have a SIM lock, insert the SIM card into the new phone and it should work so long as the phone supports the carrier's frequency band. Most cell phones have a SIM lock that prevents access to the network if the SIM card belongs to another carrier. If inserting a new SIM card prompts a request for a carrier code, the phone is SIM locked.Full Answer >