What is a Network Lock

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SIM lock:

A sim-lock, network lock, CARRIER-LOCK, imei-lock or (MASTER) SUBSIDY lock serves as a technical limitation built into GSM and CDMA cell phones by producers to be used by carriers to restrict the use of these phones to particular countries and/or networks. This is unlike a cell phone (retrospectively called SIM-free or unlocked) which doesn't enforce any SIM constraints.Unlocking a mobile phone is almost universally legal. In addition, it's legal for providers to force SIM locks for certain time periods, differing by area.


Unlocking Technology:

A mobile can be unlocked simply by entering a code supplied by the service operator. Alternative mechanisms incorporate software working on the handset or a computer connected to the device, hardware devices that link to the mobile or over-the-air by the provider. In most cases the unlock process is permanent. The code required to eliminate all locks from a cellphone is called the master code, network code key, or multi-lock code. If the device is carrier locked it will typically show one of these messages: SIM network PIN blocked, Enter lock PIN.




Economics:

Phone manufacturers have financial incentives both to bolster SIM lock security (which placates mobile phone network providers and enables exclusivity offers) and also to weaken it (extending a phone's appeal to customers that are usually not interested in the service provider that offers it). Also, making it too hard to unlock a handset could possibly make it less appealing to network service providers who have a legal duty to supply unlock codes for some handsets or in specific countries.


Unlocking Services:

Some businesses provide a online phone unlocking service . This service needs individuals that need to unlock a handset to supply their IMEI number to a service supplier and quite often they will also ask for the country and network the mobile phone handset is locked to, sometimes sent through email or entered on their web-site. The company then will supply (in return for a fee) an unlock code for the phone.


Unlocking Service Providers:

Disappointingly there are a multitude of scammers web sites working in the smart phone unlocking industry. As a consequence it pays off to ensure you find a trustworthy service provider for such a service. To assist with a search for a legitimate supplier, we've provided a listing beneath (and in no specific order) of several genuine organizations currently offering such services.


Reputable Mobile Phone IMEI Unlocking Service Providers: