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 ?
House Passes Bill to Allow Mobile Phone Unlocking, But Details Worry Advocates, PC WORLD (Feb.
143, 825-30 (stating the relevant findings by the Librarian of Congress regarding mobile phone unlocking and the DMCA); see also Cline, supra note 13, at 163 (discussing the Register of Copyrights findings regarding the cell phone unlocking exemption to the DMCA in 2010).
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 (.
UK-based 24/7 Mobile Solutions Ltd announced on Thursday (7 August) that its mobile phone unlocking SIMable chip has been shipped to 37 different countries since its launch in late April 2008, to both end users and distribution channels.