What is a NetworkLock

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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 CDMA and GSM mobile devices by manufacturers for use by carriers to restrict using these phones to specific locations and/or networks. This is contrary to a cell phone (retrospectively called SIM-free or unlocked) that doesn't impose any SIM limitations.

Almost all mobile phones can be unlocked to work with any GSM mobile phone network provider, though the phone may still show the original logos and may not support popular features of the new carrier. Besides the locking, mobile phones can also have firmware installed on them which is specific to the network provider. This firmware is installed by the service provider which is separate from the locking mechanism. Nearly all cell phones can be unbranded by re-flashing a new firmware type, a process suited to advanced users only.

Unlocking Technology:

Normally, a locked phone will show a message if a restricted SIM is used, requesting the unlock code. On the latest phone models running Android os software, the cellphone is going to show a message stating “SIM network unlock PIN” or “Enter Network Lock Control Key” if it is network locked. Windows phones will display the message, “This SIM card can only be used on specific networks. Contact your customer service center for the unlock code”. Alternative models might display different messages for instance , "Enter special code" or "Enter unlocking code," or in some circumstances the device may simply show a message saying that it's locked. When a valid code is typed in, the handset will display "Network unlocked” or “Network unlock successful”.


On many occasions a SIM-locked device is offered for sale at a considerably reduced price than an unlocked one mainly because the service provider anticipates income thru its service. SIM locks are currently employed on lower priced (pay-as-you-go) units, despite the fact that deals on more costly handsets demand a subscription that provides guaranteed income. Unlocked mobile phones have a improved market value.

Unlocking Services:

Quite a few businesses provide a carrier unlocking service . This service needs individuals whom would like to unlock a device to provide their IMEI number to a service supplier and sometimes they will also ask for the country and service provider the device is locked to, frequently sent via email or entered on their website. The supplier will then supply (for a fee) an unlock code for the device. For a few brands such as Nokia and Samsung numerous services also deliver special remote-unlocking software with instructions, where a cable connection is needed to remove the SIM lock at home. Such vendors may email the unlocking code or software that will remotely unlock the unit. The price for unlocking a phone may fluctuate dependent upon the mobile phone network its locked to and the device model itself, as every unlock code is unique to each individual device.

Unlocking Service Providers:

Regrettably there are many of dodgy websites active in the smart-phone imei unlocking industry. As a consequence it pays to be certain you locate a honest supplier for this service. Take the necessary precautions and investigate all potential retailers prior to choosing to submitting an order. In the case of online sellers, make sure they document their formal business name and associated registration information (every legitimate company has to be legally registered with the official governing bodies for their country of origin) and make certain they supply a genuine listed address and contact details on their web site. Furthermore ensure 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 never ever make payment via a direct transfer as this offers no fiancial protection. To assist with a search for a trustworthy supplier, we've provided a listing just below (and in no particular order) of several legit organizations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: