What is a SIM lock

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SIM lock:

A SIMLOCK, Network Lock, carrier-lock, imei-lock or (MASTER) subsidy lock is really a technical restriction built into GSM and CDMA mobile phones by producers for use by carriers to restrict the usage of these phones to particular locations and/or networks. This is not like a cell phone (retrospectively called SIM-free or unlocked) that doesn't impose any SIM constraints.SIM locking is extremely common if subsidized handsets are offered with prepaid contracts. It is essential to note, however, that the technology associated with the cellphone has to be compatible with the technology being used by the network carrier. A GSM mobile phone will only operate with a GSM carrier and will not operate on a CDMA network. Equally, a CDMA cell phone can only work with a CDMA service and won't work on a GSM network. Note that newer (2013+) top end cell phones are capable of supporting both CDMA and GSM technologies, permitting users to use their smart phones on any type of network.

Unlocking Technology:

A phone can be unlocked by entering a code supplied by the service operator. Alternative mechanisms consist of software running on the handset or a computer or laptop attached to the handset, hardware devices that attach to the phone or over-the-air by the service provider. Most of the time the unlock procedure is permanent. The code needed to do away with all locks from a phone is referred to as the master code, network code key, or multi-lock code. If the handset is network locked it will usually display one of the following messages: SIM network PIN blocked, Enter lock PIN.


Smartphone suppliers have monetary incentives both to bolster SIM lock protection (which placates mobile phone network organisations and will allow exclusivity discounts) as well as to weaken it (widening a mobile phone's overall appeal to consumers who may not be interested in the service provider that offers it). In addition, making it too difficult to unlock a mobile could possibly make it less desirable to mobile phone network service providers who have a legal obligation to offer unlock codes for some handsets or in particular countries.

Unlocking Services:

A few businesses provide a IMEI phone unlocking service . This service requires all those who would like to unlock a mobile phone to provide their IMEI number to a unlocking company and quite often they will also need the country and service provider the mobile phone handset is locked to, often sent via email or submitted on their website. The company will then provide (for a fee) an unlock code for the handset.

Unlocking Service Providers:

Regrettably there are many of dodgy organizations active in the smart phone IMEI unlocking industry. As a result it is recommended to ensure you find a genuine provider for such a service. If you've established that your cellphone is not Blacklisted and you wanna to unlock it so you can use it with a different network, then the most trustworthy sites to learn about [<a href= The Only Legit Way To Network Unlock Your Mobile Device] ">The Only Legit Way To Network Unlock Your Mobile Device out there is Unlock.Zone - make sure you look them up.To assist with the search for a legitimate supplier, we have supplied a listing beneath (and in no specific order) of a number of genuine organizations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: