What is a NetworkLock

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SIM lock:

A sim lock, Network-Lock, carrier lock, IMEI LOCK or (master) subsidy lock serves as a technical restriction built into CDMA and GSM smartphones by producers for use by service providers to restrict the usage of these phones to a particular locations and/or networks. This is in contrast to a cell phone (retrospectively called SIM-free or unlocked) which doesn't enforce any SIM constraints.If the phones had not been locked, owners can sign an agreement with one provider, acquire the marked down phone, then quit paying the monthly payment (thus breaking the agreement) and begin using the phone on another network or even sell the phone for a profit. SIM locking reduces this by prohibiting a change of service (using a new SIM).

Unlocking Technology:

A mobile phone can be unlocked simply by entering a code provided by the network operator. Different mechanisms incorporate software running on the handset or a pc attached to the device, hardware devices that link to the phone or over-the-air by the service provider. More often than not the unlock operation is permanent. The code required to get rid of all locks from a phone is referred to as the master code, network code key, or multi-lock code. If the phone is carrier locked it will generally show one of these messages: SIM network PIN blocked, Enter lock PIN.


In many cases a SIM-locked smartphone is sold at a noticeably lower price than an unlocked one due to the fact the service provider plans income via its service. SIM locks are used on less expensive (pay-as-you-go) devices, despite the fact that discounts on higher priced handsets require a subscription which offers guaranteed income. Unlocked phones have a increased market value.

Unlocking Services:

Many companies offer a IMEI smartphone unlocking service . This service needs all those who want to unlock a device to provide their IMEI number to a service supplier and sometimes they will also require the country and cellular network the device is locked to, frequently sent by email or entered on their web site. The supplier will then supply (for a fee) an unlock code for the phone. For a few brands as in Nokia and Samsung several services also provide special remote-unlocking software with instructions, when a cable is required to remove the SIM lock at home. Such organizations may email the unlocking code or software that should remotely unlock the device. The cost for unlocking a cell phone may fluctuate based on the network it's locked to and the device model itself, as each unlock code is unique to each unique device.

Unlocking Service Providers:

Regrettably there are a lot of dodgy sites active in the cellphone carrier unlocking industry. As a consequence it is recommended to be certain you find a honest provider for this service. Do your due diligence and investigate any prospective dealers before committing to making an order. In the case of on-line sellers, ensure they list their genuine company name and matching registration information (every legitimate business has to be legally registered with all the official authorities in their country of origin) and make certain they provide a genuine listed address and contact information on their website. In addition make sure that any payments made are by legitimate sources for instance a recognised bank or financial institution using a debt or credit card, but never ever make payment via a direct transfer as this provides no fiancial protection. To assist with a search for a trustworthy supplier, we have provided a checklist below (and in no specific order) of a few legitimate organizations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: