What is a simlock

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SIM lock:

A sim lock, network lock, carrier lock, imei lock or (MASTER) SUBSIDY lock is a technical constraint built into GSM and CDMA mobile devices by manufacturers for use by carriers to limit using these phones to particular locations and/or networks. This is unlike a phone (retrospectively called SIM-free or unlocked) that doesn't impose any SIM restrictions.

The majority phones can be unlocked to work with any GSM network provider, but the phone may still show the original branding and may not support popular features of the new carrier. In addition to the locking, mobile phones can also have firmware set up on them which is specific to the network provider. This firmware is installed through the service provider and is separate from the locking mechanism. The vast majority of smartphones can be unbranded by re-flashing a new firmware version, an operation suited to advanced users only.

Unlocking Technology:

A mobile can be unlocked by entering a code supplied by the network operator. Alternative mechanisms contain software operating on the handset or a computer or laptop attached to the device, hardware devices that connect to the phone or over-the-air by the carrier. Usually the unlock operation is permanent. The code needed to get rid of all locks from a cellphone is referred to as the master code, network code key, or multi-lock code. Generally if the phone is carrier locked it will typically show one of the following messages: SIM network PIN blocked, Enter lock PIN.


More often than not a SIM-locked mobile is sold at a substantially reduced price than an unlocked one mainly because the company is expecting income through its service. SIM locks are applied on cheaper (pay-as-you-go) mobile phones, whilst special discounts on more expensive handsets require a subscription that offers guaranteed income. Unlocked phones have a increased market value.

Unlocking Services:

Lots of companies offer a remote unlocking service . This service needs all those that want to unlock a mobile phone handset to supply their IMEI number to a unlocking company and in most cases they will also ask for the country and service provider the device is locked to, often sent by email or entered on their web-site. The supplier will then supply (in return for a fee) an unlock code for the phone.

Unlocking Service Providers:

Unfortunately there are lots of scammers web sites active in the smartphone unlocking industry. As a result it pays to ensure you locate a trustworthy provider for such a service. Do your due diligence and investigate all potential retailers before committing to making an order. In the case of online suppliers, ensure they specify their public organization name and associated registration details (every legit enterprise must be legally registered with all the official governing bodies in their country of origin) and make sure they supply a legitimate listed address and contact details on their web-site. Also make certain that any payments made are by legitimate methods for example a recognized bank or financial institution using a debt or credit card, but never make payment via a direct transfer as this offers no fiancial security. To aid with the search for a legitimate company, we have supplied a listing just below (and in no particular order) of a number of legitimate organisations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers:

Now you should be clear on what a I.M.E.I. number is and how you may retrieve it from a mobile phone, but what do you do with it? The number one uses of finding your IMEI number is to permit your cellphone to get unlocked so it can be used on an alternative cell phone service, doubtlessly saving you big by swapping to a cheaper PAYG deal. If you decide you want to unlock your smartphone, you've confirmed your cellphone isn't Blacklisted, and you would like to use it with another network, then one of the oldest and most established company to get How To Permanently Unlock The Latest Cellular Device around is Unlock.Zone - ensure you look them up!