What is a sim lock

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SIM lock:

A SIM lock, Network Lock, carrier-lock, imei-lock or (MASTER) subsidy lock is really a technical limit built into GSM and CDMA cellular phones by producers to be used by service providers to limit using these phones to specific locations and/or networks. This is contrary to a phone (retrospectively called SIM-free or unlocked) which doesn't impose any SIM restrictions.SIM locking is extremely common if subsidized devices are sold with pre pay contracts. What is important to note, however, that the technology tied in with the phone must be compatible with the systems used by the network carrier. A GSM cellular phone will only operate with a GSM carrier and isn't going to function on a CDMA network. In a similar fashion, a CDMA smartphone can only work with a CDMA network and isn't going to function on a GSM service. When you've established a cellphone is not Blacklisted and you would like to unlock it so you can use it with another carrier, then the most reliable places to learn about [<a href= Easiest Way To Network Unlock Virtually Any Cell Phone] ">Easiest Way To Network Unlock Virtually Any Cell Phone out there is Unlock.Zone - ensure you look them up.Keep in mind that modern (2013 and newer) more costly mobile phones are equipped to support both CDMA and GSM technologies, enabling customers to utilize their smartphones on virtually any network.

Unlocking Technology:

A smartphone can be unlocked simply by entering a code supplied by the network operator. Different mechanisms incorporate software operating on the device or a pc connected to the phone, hardware devices that attach to the mobile or over-the-air by the service provider. Usually the unlock operation is permanent. The code required to remove all locks from a cell phone is referred to as the master code, network code key, or multi-lock code. If the handset is carrier locked it will generally display one of these messages: SIM network PIN blocked, Enter lock PIN.


The primary reason to unlock a mobile phone handset is usually to be able to utilize it with another SIM card. Customers may wish to continue using their smartphone but with a different provider or while traveling overseas they might want to connect to a overseas network by using a prepay subscription.

Unlocking Services:

A few businesses provide a carrier mobile phone unlocking service . This service needs people whom need to unlock a mobile phone handset to provide their IMEI number to a unlocking company and quite often they will also need the country and network the device is locked to, sometimes sent by email or entered on their web site. The organization will then supply (in return for a fee) an unlock code for the mobile phone.

Unlocking Service Providers:

Unfortunately there are a multitude of dodgy organizations active in the cell phone network unlocking industry. As a consequence it pays off to make sure you use a honest provider for this service. To assist with the search for a reputable company, we have supplied a listing just below (and in no particular order) of a few legit organisations currently offering such services.

Reputable Mobile Phone IMEI Unlocking Service Providers: