What is a NetworkLock

From Back For Good
Jump to: navigation, search
SIM lock:

A sim-lock, Network-Lock, carrier lock, IMEI-Lock or (master) SUBSIDY lock is really a technical limitation built into GSM and CDMA cell phones by producers for use by carrier networks to restrict the usage of these phones to specific countries and/or networks. This is as opposed to a cell phone (retrospectively called SIM-free or unlocked) that doesn't impose any SIM limitations.Unlocking a cellphone is virtually universally legal. At the same time, it is legal for carriers to force SIM locks for certain amounts of time, varying by location.

Unlocking Technology:

Usually, a locked device will show a message if a restricted SIM is used, requesting the unlock code. On new phone models running Android software, the cellphone will show a message stating “SIM network unlock PIN” or “Enter Network Lock Control Key” if it is network locked. Windows phones are going to show the message, “This SIM card can only be used on specific networks. Contact your customer service center for the unlock code”. Some other handsets may well display alternative messages for example "Enter special code" or "Enter unlocking code," or in some instances the mobile will probably present a message stating it's locked. When a valid code is typed in, the mobile displays "Network unlocked” or “Network unlock successful”.


Smartphone makers have monetary incentives both to bolster SIM lock security (which placates mobile phone network organisations and enables exclusivity deals) and also to weaken it (extending a handset's appeal to buyers that are usually not interested in the provider that offers it). At the same time, making it very hard to unlock a smartphone could make it considerably less appealing to mobile phone network service providers who have a legal duty to offer unlock codes for some devices or in certain countries.

Unlocking Services:

Several organizations provide a remote mobile phone unlocking service . This service needs people whom want to unlock a phone to give their IMEI number to a service supplier and quite often they will also ask for the country and network the handset is locked to, often sent through email or entered on their website. The company then will provide (in return for a fee) the unlock code for the mobile phone. For some makes for instance Nokia and Samsung a variety of services also provide special remote-unlocking software with guidance, where a cable connection is needed to remove the SIM lock at home. Such companies may well email the unlocking code or software that should remotely unlock the unit. The price for unlocking a telephone will vary depending on the network it is locked to and the mobile phone model itself, as every unlock code is unique to each unique device.

Unlocking Service Providers:

Unfortunately there are a huge number of fraudulent companies active in the cell-phone IMEI unlocking industry. As a result it is prudent to be sure you use a reliable provider for such a service. Take the necessary precautions and investigate all potential suppliers in advance of choosing to making an order. In the case of on-line sellers, make sure they publish their genuine organization name and corresponding registration details (all genuine organization is required to be lawfully registered with the official governing bodies within their country of origin) and ensure they give a legitimate certified address and contact details on their web site. Also make certain that any payments made are through legitimate methods such as a recognised bank or financial institution using a debt or credit card, but do not ever make payment via a direct transfer as this provides no fiancial safety. To aid with a search for a legitimate supplier, we've supplied a list below (and in no specific order) of a number of legitimate organizations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: