What is a SIMLOCK

From Doku Wiki
Jump to: navigation, search
SIM lock:

A SIM lock, network-lock, Carrier-Lock, imei-lock or (master) subsidy lock is really a technical constraint built into CDMA and GSM cell phones by producers to be used by providers to limit the use of these phones to specific locations and/or networks. This is in contrast to a phone (retrospectively called SIM-free or unlocked) that does not impose any SIM restrictions.The reason several carriers SIM lock their phones is simply because they offer mobile phones at a discount to customers in exchange for a contract to cover the use of the network for a specific period of time, often between one and three years. This business model allows the company to recoup the price of the device across the lifetime of the agreement. These kinds of savings are worth around hundreds US dollars.

Unlocking Technology:

Typically, a locked device will display a message if a restricted SIM is used, requesting the unlock code. On the latest phone models working on Android mobile phone software, the cell phone is going to show a message saying “SIM network unlock PIN” or “Enter Network Lock Control Key” if it is network locked. Windows phones are going to display the message, “This SIM card can only be used on specific networks. Contact your customer service center for the unlock code”. Other devices may very well display a variety of messages as in "Enter special code" or "Enter unlocking code," or in some circumstances the handset may simply display a message saying that it is locked. Whenever a valid code is typed in, the mobile will display "Network unlocked” or “Network unlock successful”.


Smartphone providers have economic incentives both to enhance SIM lock security (which placates network companies and permits exclusivity deals) and to weaken it (increasing a device's allure to buyers that may not be interested in the provider that offers it). Moreover, making it too tough to unlock a smartphone might make it a lot less attractive to mobile phone network service providers with a legal duty to supply unlock codes for certain handsets or in particular countries.

Unlocking Services:

Quite a few businesses offer a network phone unlocking service . This service requires individuals that need to unlock a mobile phone handset to supply their IMEI number to a unlocking company and in most cases they will also request the country and cellular network the mobile phone handset is locked to, sometimes sent by email or entered on their web site. The organization then will provide (once you have paid) an unlock code for the device. For a few brands for example Nokia and Samsung numerous services additionally offer special remote-unlocking software with directions, when a cable is necessary to remove the SIM lock from home. Such suppliers may well email the unlocking code or software which will remotely unlock the device. The price for unlocking a cellphone will certainly change depending on the mobile phone network it is locked to and the smartphone model itself, as each unlock code is unique to each specific device.

Unlocking Service Providers:

Unfortunately there are a great deal of dodgy websites active in the cellphone carrier unlocking industry. Consequently it is advisable to be sure you find a honest supplier for such a service. Do your due diligence and investigate all prospective suppliers in advance of choosing to submitting an order. In the case of on line sellers, make sure they provide their public business name and associated registration details (all legit company must be lawfully registered with the official authorities in their country of origin) and make certain they provide a genuine registered address and contact information on their website. Furthermore make sure that any payments made are done so through legitimate methods such as a recognised bank or financial institution using a debt or credit card, but do not ever make payment via a direct transfer because this provides no fiancial security. To aid with your search for a legitimate service provider, we've supplied a list just below (and in no particular order) of a number of legit organizations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: