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Once an eSIM carrier profile has been installed on an eUICC, it operates in the same way as a physical SIM, complete with a unique ICCID and network authentication key generated by the carrier. [6] If the eSIM is eUICC-compatible, it can be re-programmed with new SIM information.
In practise "eSIM upgrade" in the form of a normal SIM card [4] is possible (using the Android 9 eSIM APIs) or eSIM can be included into an SOC. [5] The requirement of GSMA certification is that personalisation packet is decoded inside the chip and so there is no way to dump Ki, OPc and 5G keys.
Nowadays ICCID numbers are also used to identify eSIM profiles, not only physical SIM cards. ICCIDs are stored in the SIM cards and are also engraved or printed on the SIM card body during a process called personalisation. The ICCID is defined by the ITU-T recommendation E.118 as the primary account number. [19] Its layout is based on ISO/IEC 7812.
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Dual SIM phones usually have two unique IMEI numbers, one for each SIM slot. Devices that use more than two SIM cards have also been developed and released, notably the LG A290 triple SIM phone, [ 3 ] and even handsets that support four SIMs, [ 4 ] [ 5 ] such as the Cherry Mobile Quad Q70 .
Smart Communications Inc., commonly referred to as Smart, is a wholly owned wireless communications and digital services subsidiary of PLDT Inc., [1] a telecommunications and digital services provider based in the Philippines. [2] As of November 2023, it is currently the largest mobile network with 55.2 million subscribers. [3]
A prepaid phone number specifically purchased to be used briefly and then replaced is known colloquially as a burner phone or burner. [11] A Los Angeles technology company developed a mobile application of the same name that replicates this functionality for a smartphone.