SIM lock

(redirected from Mobile phone unlocking)

SIM lock

(Subscriber Identity Module lock) A function in GSM cellphones that restricts the phone's use to a particular cellular carrier (a particular SIM card). SIM locks are used to ensure subscribers finish their service contracts when the phones are heavily subsidized by the carrier. SIM locked phones may be unlocked by entering a code.

Apple's iPhone brought the SIM lock into public view because of its original exclusivity in the U.S. with AT&T. However, iPhones were readily "unlocked" by hackers both in and outside the U.S., not only to use a different carrier, but to customize their appearance and download applications even before Apple debuted its App Store. In addition, Apple allowed the GSM iPhone to be sold without the SIM lock in Australia, Taiwan, Hong Kong and other regions where locked phones were either prohibited or a recipe for marketing failure. See SIM card and iPhone jailbreaking.
References in periodicals archive ?
24/7 mobile phone unlocking services Media Contact: Nicholas Mburu, Legit Unlocks, (269) 312-7168, Email
Mobile phone unlocking has long been a grey area legally in the US, with the Library of Congress banning unlocks after Jan.
Mobile phone unlocking is now completely legal, after president Obama signed into law the Unlocking Consumer Choice and Wireless Competition Act in July, allowing consumers to unlock their devices and allowing bulk unlocks of devices.
Golden Frog believes that copyright should not be used as a means restrict consumers to use a particular service provider and encourages all netizens to join them in voicing support for mobile phone unlocking.
pdf) voiced his concern about mobile phone unlocking (.
The company has consistently pulled out all stops to position itself as a leader in mobile phone unlocking.
Looking ahead, UnlockBase plans to continue introducing new services and features as part of its mission to be the world leader in mobile phone unlocking.
Sim-Tek offer a mobile phone unlocking service which is provided onsite, and whilst you wait.
13 /PRNewswire/ -- The Furious Team, designers of the award winning Furious Gold mobile phone unlocking software, proudly announced the 2008 release of their updated P2PGSM mobile phone file sharing solution.