What is a imeilock

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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 GSM and CDMA mobile phones by manufacturers to be used by providers to limit using these phones to particular countries and/or networks. This is in contrast to a phone (retrospectively called SIM-free or unlocked) which doesn't impose any SIM restrictions.SIM locking is extremely common if subsidized handsets are sold with pre-paid contracts. It is really important to note, however, that this technology associated with the smartphone will need to be compatible with the systems being employed by the network carrier. A GSM cellphone can only operate with a GSM carrier and are not going to work on a CDMA network. Similarly, a CDMA mobile can only work with a CDMA service and will not work on a GSM network. Keep in mind that new (2013 and newer) pricier cellphones are capable of supporting both CDMA and GSM technologies, letting consumers to use their mobile devices on almost any network.

Unlocking Technology:

Normally, a locked handset will show a message if a restricted SIM is used, requesting the unlock code. On the latest phone models running Android software, the phone should show a message stating “SIM network unlock PIN” or “Enter Network Lock Control Key” if it is 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 may show assorted messages as in "Enter special code" or "Enter unlocking code," or in some circumstances the device will simply show a message stating that it's locked. Once a valid code is typed in, the mobile will display "Network unlocked” or “Network unlock successful”.


In many cases a SIM-locked smartphone is offered for sale at a considerably reduced cost than an unlocked one on the grounds that the supplier is expecting income through its service. SIM locks are employed on lower priced (pay-as-you-go) devices, though bargains on higher priced handsets need a subscription that offers guaranteed income. Unlocked handsets have a improved market value.

Unlocking Services:

Quite a few organizations offer a permanent cell phone unlocking service . This service requires those people that wish to unlock a mobile phone to supply their IMEI number to a service supplier and in most cases they will also request the country and cellular network the handset is locked to, sometimes sent through email or entered on their web-site. The organization will then provide (in return for a fee) the unlock code for the phone.

Unlocking Service Providers:

Unfortunately there are lots of dodgy online retailers operating in the smart-phone network 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 prospective retailers before choosing to making an order. In the case of online suppliers, make certain they list their registered company name and matching registration information (all legit business must be lawfully registered with the official authorities in their country of origin) and ensure they give a genuine certified address and contact information on their web site. In addition make certain that any payments made are done so through legitimate methods for instance a recognized bank or financial institution using a debt or credit card, but do not ever make payment via a direct transfer since this offers no fiancial safeguards. To assist with the search for a trustworthy supplier, we've provided an inventory below (and in no specific order) of several legit organizations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: