In a mobile phone, for what do the letters SIM, as in SIM card, stand?
Dual SIM foreign network while keeping the existing local card. Vendors of foreign SIMs for travel often promote dual-SIM operation as a means to substitute their card for a home country provider's card seamlessly on the same handset. Dual SIM Dual SIM refers to mobile phones that support use of multiple SIM cards. When a second SIM card is installed, the phone either allows users to switch between two separate mobile network services manually, has hardware support for keeping both connections in a "standby" state for automatic switching, or has individual transceivers for maintaining both network connections at once. Dual SIM phones
SIM lock Belgium's anti-bundling law. The Belgian government was given until May 2009 to change the law, failing which the European Commission would commence proceedings against Belgium. This leaves China, Singapore and Israel as the only countries in the world that forbid SIM locking and contract/phone bundling outright. Chile initiated a ban as of January 1, 2012. See also: SIM locking in Croatia In Brazil, SIM locks are not prohibited. However, the mobile carrier must inform the consumer of the existence of a SIM lock. Anatel, Brazil's telecom regulator, requires the carrier to unlock free of charge the mobile phone if required