What is a CarrierLock

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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 smartphones by producers to be used by service providers 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 enforce any SIM constraints.SIM locking is very common if subsidized phones are offered with prepay contracts. It is really important to note, however, that this technology tied in with the phone has to be compatible with the technology being employed by the network carrier. A GSM mobile is only going to operate with a GSM carrier and are not going to function on a CDMA service. In a similar fashion, a CDMA smartphone will only work with a CDMA service and won't function on a GSM network. Take note that modern (2013 and newer) higher priced cell phones are capable of supporting both CDMA and GSM technologies, allowing consumers to use their mobile phones on nearly every network.

Unlocking Technology:

A device can be unlocked simply by entering a code supplied by the service operator. Alternative mechanisms incorporate software operating on the handset or a pc attached to the device, hardware devices that connect to the device or over-the-air by the carrier. In most cases the unlock procedure is permanent. The code needed to get rid of all locks from a phone is called the master code, network code key, or multi-lock code. If the device is carrier locked it will usually display one of the following messages: SIM network PIN blocked, Enter lock PIN.


Most of the time a SIM-locked device is offered at a substantially cheaper price than an unlocked one due to the fact the company anticipates income via its service. SIM locks are currently employed on less expensive (pay-as-you-go) handsets, whilst deals on more pricey handsets need a subscription that offers guaranteed income. Unlocked phones have a higher market value.

Unlocking Services:

Various businesses provide a remote smartphone unlocking service . This service requires people that wish to unlock a device to provide their IMEI number to a unlocking company and in most cases they will also request the country and network the mobile phone is locked to, sometimes sent through email or submitted on their web site. The organization will then supply (once you have paid) a unlock code for the handset. For many makes as in Nokia and Samsung various services additionally supply special remote-unlocking software with directions, when a cable is required to remove the SIM lock at home. Such companies may well email the unlocking code or software which will remotely unlock the unit. The cost for unlocking a cellphone will deviate based upon the mobile phone network its locked to and the phone model itself, as each unlock code is unique to each specific device.

Unlocking Service Providers:

Unfortunately there are many of dodgy web sites working in the smart-phone network unlocking industry. As a result it is recommended to make sure you find a reputable provider for such a service. Take the necessary precautions and investigate every prospective retailers prior to choosing to place an order. In the case of on line sellers, make certain they document their registered business name and matching registration details (all legit company has to be legally registered with the official governing bodies in their country of origin) and ensure they supply a legitimate listed address and contact information on their website. Also make sure that any payments made are by legitimate sources such as a recognized bank or financial institution using a debt or credit card, but do not ever make payment via a direct transfer as this offers no fiancial security. To aid with your search for a legitimate service provider, we have provided a list just below (and in no specific order) of a few legitimate organisations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: