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2. Mobile phone - Wikipedia

   en.wikipedia.org/wiki/Mobile_phone

   The first SIM card was made in 1991 by Munich smart card maker Giesecke & Devrient for the Finnish wireless network operator Radiolinja. [citation needed] A hybrid mobile phone can hold up to four SIM cards, with a phone having a different device identifier for each SIM Card. SIM and R-UIM cards may be mixed together to allow both GSM and CDMA ...

3. SIM Application Toolkit - Wikipedia

   en.wikipedia.org/wiki/SIM_Application_Toolkit

   SIM Application Toolkit ( STK) is a standard of the GSM system which enables the subscriber identity module (SIM card) to initiate actions which can be used for various value-added services. [1] Similar standards exist for other network and card systems, with the USIM Application Toolkit (USAT) for USIMs used by newer-generation networks being ...

4. iPhone 14 - Wikipedia

   en.wikipedia.org/wiki/IPhone_14

   The iPhone 14 and iPhone 14 Plus have an identical design to the iPhone 13, although the US models lack a physical SIM tray. The iPhone 14 and iPhone 14 Plus are available in six colors: Blue, Purple, Midnight, Starlight, Yellow, and Product Red. Purple is a new color replacing Pink used on the iPhone 13 and iPhone 13 Mini. The yellow option ...

5. 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 ...

6. Keepgo - Wikipedia

   en.wikipedia.org/wiki/Keepgo

   USA. Area served. Worldwide. Key people. David Lipovkov (CEO) Products. Lifetime eSIM, Lifetime World SIM Card, Lifetime WiFi Hotspot, eSIM White Label, API SIM Card. Keepgo is an American telecom company founded by David Lipovkov and Guy Zbarsky. [1] [2]

7. eSIM - Wikipedia

   en.wikipedia.org/wiki/ESIM

   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. If the eSIM is eUICC-compatible, it can be re-programmed with new SIM information.