What is a SIMLock

From Spinal Hub
Jump to: navigation, search
SIM lock:

A SIM-Lock, NETWORK LOCK, CARRIER-LOCK, IMEI-Lock or (MASTER) subsidy lock is actually a technical limit built into GSM and CDMA cell phones by manufacturers to be used by service providers to limit the use of these phones to a particular countries and/or networks. This is unlike a phone (retrospectively called SIM-free or unlocked) that doesn't impose any SIM restrictions.

Almost all mobile handsets can be unlocked to work with any GSM network provider, however phone may still show the original logos and may not support features of the new carrier. In addition to the locking, cell phones could also have firmware attached to them which is specific to the network provider. This firmware is installed through the service provider and is separate from the locking mechanism. Many smartphones can be unbranded by re-flashing an alternative firmware variation, an operation recommended for advanced users only.

Unlocking Technology:

A phone can be unlocked simply by entering a code supplied by the service operator. Different mechanisms include software operating on the handset or a computer or laptop attached to the handset, hardware devices that link to the mobile or over-the-air by the service provider. Usually the unlock operation is permanent. The code needed to do away with all locks from a cell phone is referred to as the master code, network code key, or multi-lock code. If the handset is carrier locked it will usually display one of these messages: SIM network PIN blocked, Enter lock PIN.


The primary reason to unlock a device is usually to be able to utilize it with a different SIM card. Consumers might like to keep on using their cellphone but with a new provider or while traveling abroad they may wish to connect to a overseas network with a pre-paid subscription.

Unlocking Services:

A certain amount of businesses provide a unlocking service . This service needs those people whom would like to unlock a mobile phone handset to give their IMEI number to a unlocking company and frequently they will also ask for the country and network the mobile phone is locked to, either sent through email or submitted on their web site. The supplier will then supply (at a cost to you) a unlock code for the phone. For a lot of brands for instance Nokia and Samsung a variety of services also offer unique remote-unlocking software with instructions, when a cable is needed to remove the SIM lock from home. Such companies may well email the unlocking code or software that will remotely unlock the unit. The cost for unlocking a cellular phone will certainly vary dependent upon the mobile phone network its locked to and the mobile phone model itself, as each unlock code is unique to each unique device.

Unlocking Service Providers:

Disappointingly there are a massive number of fraudulent websites active in the smartphone imei unlocking industry. Consequently it is prudent to ensure you use a reputable service provider for these services. To aid with a search for a trustworthy service provider, we have supplied a list just below (and in no specific order) of several legit organizations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: