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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

   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.

4. Personal unblocking key - Wikipedia

   en.wikipedia.org/wiki/Personal_unblocking_key

   A personal unblocking key ( PUK ), sometimes called personal unblocking code ( PUC ), is used in SIM cards to reset a personal identification number (PIN) that has been lost or forgotten. Most mobile phones offer the feature of PIN protection. After switching on the phone, if the PIN security function is active, the user is required to enter a ...

5. Mint Mobile - Wikipedia

   en.wikipedia.org/wiki/Mint_Mobile

   Mint Mobile, LLC is a mobile virtual network operator owned by T-Mobile US. Mint Mobile offers users the option to buy either a physical SIM card or an eSIM online. They charge users in increments of 3, 6, or 12 months, with discounts that vary depending on the length of the subscription. [3]

6. Mobile identity management - Wikipedia

   en.wikipedia.org/wiki/Mobile_identity_management

   Mobile identity management. Mobile identity is a development of online authentication and digital signatures, where the SIM card of one's mobile phone works as an identity tool. Mobile identity enables legally binding authentication and transaction signing for online banking, payment confirmation, corporate services, and consuming online content.

7. Mobile signature - Wikipedia

   en.wikipedia.org/wiki/Mobile_signature

   Technically the mobile signature is created by a security module when a request for it reaches the device ( SIM card) and after introducing the request to the user with a few explanation prompts, the device asks for a secret code that only the correct user should know. Usually, this is in form of a PIN.