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A typical SIM card (mini-SIM with micro-SIM cutout) A SIM card or SIM (Subscriber Identity Module) is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as mobile phones and laptops).
The Apple SIM is known as a Removable SIM with Remote Provisioning [5] – 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. [6]
For GSM, UMTS and LTE networks, this number was provisioned in the SIM card and for cdmaOne and CDMA2000 networks, in the phone directly or in the R-UIM card (the CDMA equivalent of the SIM card). Both cards have been superseded by the UICC. An IMSI is usually presented as a 15-digit number but can be shorter.
The phone identifies the subscriber by transmitting the International mobile subscriber identity (IMSI) number, which is stored on a SIM card that can, in theory, be transferred to any handset. However, the network's ability to know a subscriber's current, individual device enables many network and security features.
This list ranks the countries of the world by the number of mobile phone numbers in use. As an important caveat, this list does not provide the number of mobile phones in use. It is common for each SIM card has a separate phone number, so phones with multiple SIM cards will have multiple phone numbers.
The IMSI is often used as a key in the home location register ("subscriber database") and the MSISDN is the number normally dialed to connect a call to the mobile phone. A SIM has a unique IMSI that does not change, while the MSISDN can change in time, i.e. different MSISDNs can be associated with the SIM.
The iPhone 13 and iPhone 13 Mini (stylized as iPhone 13 mini) are smartphones developed and marketed by Apple. They are the fifteenth generation of iPhones , succeeding the iPhone 12 and 12 Mini . They were unveiled at an Apple Event in Apple Park in Cupertino , California, on September 14, 2021, alongside the higher-priced iPhone 13 Pro and ...
iPhone 13 Pro Max iPhone 13 Pro iPhone 13 iPhone 13 Mini iPhone 12 Pro Max iPhone 12 Pro iPhone 12 iPhone 12 Mini iPhone SE (2nd generation) iPhone 11 Pro Max iPhone 11 Pro iPhone 11 iPhone XR iPhone XS Max iPhone XS; Picture Initial release operating system: iOS 17.0: iOS 16.0: iOS 15.4: iOS 15.0: iOS 14.1: iOS 13.4: iOS 13.0: iOS 12.0: Latest ...