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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. Apple SIM - Wikipedia

   en.wikipedia.org/wiki/Apple_SIM

   The Apple SIM is known as a Removable SIM with Remote Provisioning [4] – it is a special SIM card that may be configured with different operator profiles. This is in contrast to an embedded SIM, which is not removable and may also be remotely provisioned. It appears that Apple has begun to include both types of SIM in their newer devices.

4. iPhone hardware - Wikipedia

   en.wikipedia.org/wiki/IPhone_hardware

   The iPhone 5 and later iPhones use nano-SIM in order to save space internally. The iPhone XS and later iPhones added eSIM support in addition to nano-SIM, therefore they support Dual SIM functionality. iPhone 14 and 14 Pro and later models sold in the United States do not have the SIM card slot, and instead only supports eSIM.

5. Type Allocation Code - Wikipedia

   en.wikipedia.org/wiki/Type_Allocation_Code

   The Type Allocation Code (TAC) is the initial eight- digit portion of the 15-digit IMEI and 16-digit IMEISV codes used to uniquely identify wireless devices. The Type Allocation Code identifies a particular model (and often revision) of wireless telephone for use on a GSM, UMTS, LTE, 5G NR, iDEN, Iridium or other IMEI-employing wireless network ...

6. 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 ...

7. List of iPhone models - Wikipedia

   en.wikipedia.org/wiki/List_of_iPhone_models

   SIM card form-factor Dual SIM with one Nano-SIM and one eSIM, supports dual eSIM. No physical SIM card form-factor in U.S. models Dual SIM with one Nano-SIM and one eSIM: Dual SIM with one Nano-SIM and one eSIM, supports dual eSIM Dual SIM with one Nano-SIM and one eSIM: Dual Nano-SIM in Mainland China, Hong Kong and Macau Single Nano-SIM in ...