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On recent phone models running Android software, the phone will display a message saying "SIM network unlock PIN" or "Enter Network Lock Control Key" if network locked. Windows phones will display the message, "This SIM card can only be used on specific networks. Contact your customer service center for the unlock code".
The SIM card allows users to change phones by simply removing the SIM card from one mobile phone and inserting it into another mobile phone or broadband telephony device. A SIM card contains its unique serial number, internationally unique number of the mobile user , security authentication and ciphering information, temporary information ...
Rooting is distinct from SIM unlocking and bootloader unlocking. The former allows removing the SIM card lock on a phone, while the latter allows rewriting the phone's boot partition (for example, to install or replace the operating system). [5]
• Anti-Theft security - Keeps your phone and mobile devices safe with remote locator, device lock, device erase, SIM card removal lock, and more. Web protection • Antivirus protection - Protection against viruses, spyware, malware, and other online attacks.
The assumption is that a customer will buy the handset, and then activate with the SIM-card in the pack, which will eventually lead to the operator making money via top-ups on the phone. Box breakers subvert this by buying the phones, and unlocking the phone (SIM lock) so that it can be used with any SIM-card, i.e. on any network.
An eSIM (embedded SIM) is a form of SIM card that is embedded directly into a device as software installed onto a eUICC chip. 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.
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).
Remote SIM provisioning is a specification realized by GSMA that allows consumers to remotely activate the subscriber identity module (SIM) embedded in a portable device such as a smart phone, smart watch, fitness band or tablet computer.