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eSIMs cannot be easily transferred to another phone; the process usually requires technical support. [37] If a phone is broken, anything restricted to the eSIM's network becomes inaccessible; in particular, calls cannot be received, and resources (calls, SMS, data) paid for cannot be used.
The language that is used to describe these specification is a little confusing since eSIM is not a physical format (or "form factor" - the phrase that is used to describe the various SIM sizes). The eSIM describes the functionality in the SIM, not the physical size of the SIM - and there are eSIMs in many formats (2FF, 3FF, 4FF, MFF).
Windows Phone September 2012 Nokia Lumia 610 NFC version only Lumia 620: Windows Phone January 2013 all versions Lumia 720: Windows Phone April 2013 all versions Lumia 730: Windows Phone September 2014 all versions Lumia 735: Windows Phone September 2014 all versions Lumia 810: Windows Phone November 2012 all versions Lumia 820: Windows Phone ...
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. [citation needed]
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).
An Android phone, showing that it is connected to a 5G network An Apple iPhone showing that it is connected to a 5G Network. In telecommunications, 5G is the fifth generation of cellular network technology, which mobile operators began deploying worldwide in 2019 as the successor to 4G. 5G is based on standards defined by the International Telecommunication Union under the IMT-2020 ...
An Android phones signed into a Google account can be remotely locked and erased via Google's Find My Device service, as long as it is connected to the Internet.
Peak download rates up to 299.6 Mbit/s and upload rates up to 75.4 Mbit/s depending on the user equipment category (with 4×4 antennas using 20 MHz of spectrum). Five different terminal classes have been defined from a voice-centric class up to a high-end terminal that supports the peak data rates.