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2. SIM card - Wikipedia

   en.wikipedia.org/wiki/SIM_card

   SIM cards are identified on their individual operator networks by a unique international mobile subscriber identity (IMSI). Mobile network operators connect mobile phone calls and communicate with their market SIM cards using their IMSIs. The format is: The first three digits represent the Mobile country code (MCC).

3. eSIM - Wikipedia

   en.wikipedia.org/wiki/ESIM

   Evolution of SIM cards. An eSIM is not removable. An eSIM (embedded SIM) is a form of SIM card that is embedded directly into a device. Instead of an integrated circuit located on a removable SIM card, typically made of PVC, an eSIM consists of software installed onto an eUICC chip permanently attached to a device.

4. SIM lock - Wikipedia

   en.wikipedia.org/wiki/SIM_lock

   A SIM lock, simlock, network lock, carrier lock or ( master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks. This is in contrast to a phone (retrospectively called SIM-free or ...

5. The next generation of phones will make SIM cards obsolete

   www.aol.com/article/2015/07/17/the-next...

   The SIM card is what connects a cellphone to the network, but since it's proprietary of each one, it is a pain to use when traveling and you need to switch from one carrier to another.

6. Free sim cards for Big Issue vendors - AOL

   www.aol.com/free-sim-cards-big-issue-000100216.html

   Big Issue vendors are to be given free sim cards and data vouchers to help them cope with the worsening cost-of-living crisis. Virgin Media O2 announced it will be working with the Big Issue Group ...

7. SIM Registration Act - Wikipedia

   en.wikipedia.org/wiki/SIM_Registration_Act

   The SIM Registration Act, officially designated as Republic Act No. 11934 and commonly referred to as the SIM card law, is a Philippine law mandating the registration of SIM cards before activation. Under the measure, mobile device users, must register their SIM cards, whether prepaid or postpaid. The law was enacted intending to curb ...