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.
Different carriers operate in different frequencies, and the internal antennae of cell phones are normally compatible with a limited amount of frequencies. Most modern smart phones are compatible with multiple frequencies, and the same phone frequently comes in different versions based on the frequency bands it supports. Check with the manufacturer and the carrier to verify this information. If the phone requests a carrier code when inserting a SIM card, it means it's SIM locked. Carriers normally provide this information once a customer is out of contract or in good standing with the company for a specific number of days and requests the information. There is no standard procedure to request a carrier unlock code, so check with your carrier. Some carriers do not provide unlock codes at all. Some phones may be unlocked by other procedures without carrier consent.Learn More
When a cell phone says that the "SIM card is full," this most likely this means that the SIM card has reached its maximum storage capacity. A user needs to delete contacts and text messages or upgrade to a larger SIM card for more storage space.Full Answer >
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 >
According to Consumer Cellular, a SIM card is usually located under the battery in a cellphone. This may vary depending on model and maker. A SIM eject tool is sometimes necessary to remove the SIM card.Full Answer >
A pay-as-you-go SIM card is only usable in a contract phone that uses GSM technology and has been unlocked. To unlock a contract phone, you need the unlock code for your specific model.Full Answer >