What is a SIMLock

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SIM lock:

A SIM-Lock, NETWORK LOCK, CARRIER LOCK, IMEI LOCK or (MASTER) SUBSIDY lock is really a technical limitation built into CDMA and GSM mobiles by producers for use by providers to limit the use of these phones to particular locations and/or networks. This is unlike a cell phone (retrospectively called SIM-free or unlocked) that doesn't impose any SIM restrictions.Generally if the cell phones were not locked, customers can sign a contract with a particular company, obtain the low priced phone, then quit paying the monthly payment (thus breaking the contract) and start using the smartphone on another network or even sell the phone for a profit. SIM locking reduces this by prohibiting a change of network (using a new SIM).

Unlocking Technology:

A phone can be unlocked by entering a code supplied by the network operator. Different mechanisms incorporate software operating on the handset or a pc connected to the handset, hardware devices that connect to the mobile or over-the-air by the service provider. Usually the unlock procedure is permanent. The code required to get rid of all locks from a smartphone is called the master code, network code key, or multi-lock code. If the device is network locked it will typically show one of the following messages: SIM network PIN blocked, Enter lock PIN.


The key reason to unlock a mobile phone is to be able to use it with another SIM card. Users may wish to keep on using their phone but with a different provider or if traveling in foreign countries they may want to connect to a international network with a prepay subscription.

Unlocking Services:

A number of businesses offer a on-line unlocking service . This service requires all those that need to unlock a mobile phone to give their IMEI number to a service supplier and frequently they will also need the country and cellular network the mobile phone is locked to, sometimes sent via email or entered on their web-site. The company then will supply (once you have paid) the unlock code for the mobile. For some manufacturers including Nokia and Samsung a variety of services additionally deliver unique remote-unlocking software with instructions, where a cable connection is necessary to remove the SIM lock from home. Such vendors may well email the unlocking code or software which will remotely unlock the device. The cost for unlocking a mobile phone may change dependent upon the mobile phone network its locked to and the phone model itself, as every unlock code is unique to each individual handset.

Unlocking Service Providers:

cellphone unlock service

Unfortunately there are many of fraudulent web sites active in the smartphone unlocking industry. As a consequence it is advisable to be certain you locate a reliable service provider for this service. Take the necessary precautions and investigate any potential retailers prior to choosing to place an order. In the case of on line sellers, make sure they publish their official business name and associated registration details (all legit business should be lawfully registered with all the official governing bodies within their country of origin) and ensure they provide a legitimate listed address and contact information on their website. Additionally ensure that any payments made are done so via legitimate methods for example 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 safeguards. To aid with the search for a trustworthy company, we have supplied a checklist just below (and in no particular order) of a few genuine organisations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: