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 constraint built into CDMA and GSM mobile phone devices by producers to be used by providers to restrict the usage of these phones to specific countries and/or networks. This is not like a phone (retrospectively called SIM-free or unlocked) which doesn't impose any SIM restrictions.The main reason a lot of carriers SIM lock their devices is simply because they provide cell phones at a low cost to consumers in exchange for a contract to pay for the use of the network for a specified period of time, commonly between one to three years. This business model allows the organization to recover the price of the device across the lifetime of the agreement. These discounts are worth close to several hundred US dollars.

Unlocking Technology:

A phone can be unlocked simply by entering a code provided by the service operator. Different mechanisms incorporate software operating on the handset or a computer or laptop connected to the device, hardware devices that connect to the handset or over-the-air by the carrier. Almost always the unlock operation is permanent. The code needed to eliminate all locks from a mobile phone is called the master code, network code key, or multi-lock code. If the phone is network locked it will usually show one of the following messages: SIM network PIN blocked, Enter lock PIN.


Mobile phone providers have economic incentives both to bolster SIM lock protection (which placates mobile phone network providers and will allow exclusivity deals) and to weaken it (extending a device's allure to customers that may not be interested in the service provider that offers it). Moreover, making it too hard to unlock a phone could possibly make it a lot less desirable to network service providers who've a legal responsibility to offer unlock codes for some handsets or in specific countries.

Unlocking Services:

Certain businesses provide a remote unlocking service . This service needs people whom need to unlock a handset to supply their IMEI number to a unlocking company and often they will also need the country and service provider the mobile phone handset is locked to, frequently sent through email or submitted on their web site. The company will then supply (at a cost to you) an unlock code for the mobile phone handset.

Unlocking Service Providers:

Disappointingly there are lots of scammers on-line retailers working in the smart phone network unlocking industry. As a result it pays to be certain you locate a trustworthy service provider for these services. Take the necessary precautions and investigate every potential retailers prior to choosing to submitting an order. In the case of on-line sellers, make certain they provide their official company name and matching registration details (all genuine enterprise is required to be legally registered with all the official authorities in their country of origin) and ensure they give a genuine listed address and contact information on their web-site. In addition make certain that any payments made are done so through legitimate sources as in a recognized 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 security. To assist with the search for a trustworthy company, we have provided a list just below (and in no specific order) of a number of legitimate organisations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: