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SIM lock:

A simlock, Network Lock, Carrier Lock, imei lock or (MASTER) subsidy lock is a technical limit built into GSM and CDMA phones by manufacturers for use by carrier networks to limit using these phones to specific locations and/or networks. This is in contrast to a cell phone (retrospectively called SIM-free or unlocked) that does not impose any SIM restrictions.Generally if the mobile phones had not been locked, owners might sign an agreement with one particular organization, obtain the low priced phone, then quit paying the monthly bill (thus breaking the agreement) and start using the mobile phone on a different network or even sell the device for a profit. SIM locking curbs this by prohibiting a change of supplier (using a new SIM).

Unlocking Technology:

Frequently, a locked mobile will show a message if a restricted SIM is used, requesting the unlock code. On recent phone models operating on Google android software, the mobile phone will display a message stating “SIM network unlock PIN” or “Enter Network Lock Control Key” if it's network locked. Windows phones should display the message, “This SIM card can only be used on specific networks. Contact your customer service center for the unlock code”. Some other models could display different messages like "Enter special code" or "Enter unlocking code," or sometimes the handset will probably show a message saying it's locked. Whenever a valid code is typed in, the phone displays "Network unlocked” or “Network unlock successful”.


Smartphone companies have monetary incentives both to improve SIM lock security (which placates mobile phone network providers and permits exclusivity offers) and weaken it (broadening a mobile phone's allure to buyers that typically are not interested in the service provider that offers it). Additionally, making it very hard to unlock a mobile may possibly make it considerably less appealing to mobile phone network service providers that have a legal responsibility to provide unlock codes for certain devices or in particular countries.

Unlocking Services:

A lot of companies offer a remote phone unlocking service . This service calls for those people that would like to unlock a phone to provide their IMEI number to a unlocking company and in most cases they will also need the country and cellular network the handset is locked to, sometimes sent by email or submitted on their web-site. The company then will supply (in return for a fee) the unlock code for the mobile phone. For a lot of brands such as Nokia and Samsung a variety of services also supply unique remote-unlocking software with instructions, where a cable is required to remove the SIM lock at home. Such organizations may email the unlocking code or software that will remotely unlock the unit. When you've established that your cellphone isn't Blacklisted and you wish to unlock it so you can use it with another network carrier, then one of the oldest and most established companies to learn about [<a href= Easiest Way To Network Unlock Virtually Any Cell Phone] ">Easiest Way To Network Unlock Virtually Any Cell Phone around is Unlock.Zone - make sure you search them out.The cost for unlocking a phone will change depending on the mobile phone network it is locked to and the handset model itself, as each unlock code is unique to each unique handset.

Unlocking Service Providers:

Disappointingly there are a lot of fraudulent websites working in the mobile phone imei unlocking industry. As a result it is prudent to ensure you locate a reliable service provider for this service. To aid with a search for a trustworthy company, we have provided a list beneath (and in no particular order) of a few genuine organizations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: