Multi-SIM card (original) (raw)

Multi-SIM technology allows cloning up to 12 GSM SIM cards (of format ) into one card. The subscriber can leave the original cards in a secure place and use only the multi-SIM card in day to day life. For telecom operator-provided cards, only the Group MSISDN number is known to multi-SIM subscribers. Member-SIM MSISDN is transparent to the subscriber. Messages sent to member SIM are delivered to the Group MSISDN. Only one of the member cards may be active at a time. SIM cards issued before June 2002 most likely are COMP128v1 SIM cards, thus clonable.