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First released in March 2016, eSIM is a global specification by the GSMA that enables remote SIM provisioning; end-users can change mobile network operators without the need to physically swap a SIM from the device. [1] eSIM technology has been referred to as a disruptive innovation for the mobile telephony industry.
A typical SIM card (mini-SIM with micro-SIM cutout) A SIM (Subscriber Identity Module) card 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).
Many countries have acknowledged the use of the IMEI in reducing the effect of mobile phone thefts. For example, in the United Kingdom, under the Mobile Telephones (Re-programming) Act, changing the IMEI of a phone, or possessing equipment that can change it, is considered an offence under some circumstances.
VoLTE, VoWIFI, ViLTE, eSIM; 52.5 [35] (Aug 2023) Public (41.55%) NTT Docomo (14.5%) ... For a more comprehensive list of mobile phone operators, see Mobile country codes
In 2017, after several years of development, Keepgo patented the EzFi Virtual Sim technology (compatible with GSMA eSIM). [9] [10] In 2018, Keepgo developed a white label service to enable companies to add global cellular connectivity to their products. Keepgo service utilizes pSIM (physical SIM card).
Once a mobile phone has successfully attached to a GSM network as described above, calls may be made from the phone to any other phone on the global Public Switched Telephone Network. The user dials the telephone number , presses the send or talk key, and the mobile phone sends a call setup request message to the mobile phone network via the ...
“Therefore, if someone hacks your phone, they would have access to the following information: email addresses and phone numbers (from your contacts list), pictures, videos, documents, and text ...
A hardlocked phone is one in which a telecom provider has modified the firmware on the phone to make it impossible to manually enter the unlock codes in any way. The only solution to SIM-unlock such a phone is to change the firmware to a firmware which has not been modified by any telecom provider, a so-called "unbranded firmware".