Although blocked and locked are similarly spelled, there is a world of difference when it comes to the meaning of each word.
Network carriers block the IMEI number of cell phones that have been reported lost or stolen by the owner or because one or more bills have not been paid on time. A locked cell phone is a phone that has been programmed for use with only a SIM card from a specific network carrier.
Also known as blacklisted or barred, the IMEI block prevents the owner from using the phone in the normal way and will start to experience a progressive decrease in the phone’s functionalities. The owner will most likely be able to connect to the Internet and send text messages, but won’t be able to receive incoming or make outgoing calls.
If you are unsure if your cell phone has been blocked, check to see if you have coverage by inserting the phone’s SIM card into another phone which is network unlocked. If this option isn’t available, you can find out using doctorSIM’s free blacklist check. To unblock your phone you will need to contact your network carrier as by any other means is illegal.
A network, SIM, carrier or subsidy lock is a technical restriction incorporated into cell phones by the manufacturers so network carriers can sell phones that can only be used on their network. Network carriers lock cell phones so they can offer them at a discount to their customers in exchange for a contract to pay for the use of the network for a specified period of time, usually 24 months.
Fortunately, this restriction can be removed easily by inserting an unlock code or, in the case of an iPhone, by simply connecting to iTunes once you have received authorization from Apple. Networking unlocking a cell phone is 100% legal and will not void the manufacturer’s warranty or damage the device in any way. doctorSIM can help you unlock your phone if you do not meet the unlocking requirements established by your carrier.
We highly recommend checking to see if your phone has been blocked prior to submitting your unlocking request. Even though the unlock code or instructions are valid, they may not work on a phone with a blocked IMEI number. Your phone will not work properly until the network that blacklisted it removes the block.