What is a simlock

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SIM lock:

A sim-lock, NETWORK-LOCK, Carrier Lock, imei lock or (master) SUBSIDY lock is really a technical restriction built into CDMA and GSM smartphones by producers to be used by carriers to limit the usage of these phones to a particular locations and/or networks. This is as opposed to a phone (retrospectively called SIM-free or unlocked) that does not enforce any SIM restrictions.

Unlocking Technology:

A mobile can be unlocked simply by entering a code supplied by the network operator. Different mechanisms consist of software working on the device or a computer connected to the device, hardware devices that connect to the mobile or over-the-air by the carrier. Generally the unlock process is permanent. The code required to eliminate all locks from a cell phone is called the master code, network code key, or multi-lock code. If the phone is network locked it will usually display one of the following messages: SIM network PIN blocked, Enter lock PIN.


The main reason to unlock a handset is to be able to utilize it with a different SIM card. Customers might need to carry on using their cellphone but with a new service provider or if traveling in foreign countries they might like to connect to a international network using a prepaid subscription.

Unlocking Services:

Lots of businesses provide a phone unlocking service . This service requires those people who wish to unlock a mobile phone handset to give their IMEI number to a unlocking company and in most cases they will also require the country and service provider the handset is locked to, frequently sent by email or entered on their website. The company will then provide (for a fee) the unlock code for the phone.

Unlocking Service Providers:

Disappointingly there are many of fraudulent websites active in the cellphone network unlocking industry. Consequently it is prudent to be sure you find a honest provider for this service. To aid with your search for a trustworthy company, we have provided a checklist just below (and in no specific order) of a number of legitimate organisations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: