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After switching on the phone, if the PIN security function is active, the user is required to enter a 4-8 digit PIN to unlock the SIM card and connect to the mobile network. Without this, functions such as phone calls (except for emergency calls), text messages and mobile data will not be available.
GSM: (SIM unlock) globe smart sun Alltel or Verizon Wireless do not use any type of subsidy locks on their CDMA phones. Default Code:000000 or 123456 or 654321 Prepaid cellphones from Alltel & Verizon Wireless come locked from the store, but Verizon Wireless prepaid cellphones can be unlocked with a call to Verizon.
A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks.
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Asus used to provide an Unlocking tool for both of their smartphone lines, the Zenfone and ROG Phone. This worked as an installable .apk file that the user could install on their phone, then unlock the bootloader. The app worked by contacting Asus unlocking servers, then prompting the user to perform a factory reset.
SIM Application Toolkit (STK) is a standard of the GSM system which enables the subscriber identity module (SIM card) to initiate actions which can be used for various value-added services. [1]
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).
S. 517 would repeal a rule published in October 2012 by the Librarian of Congress (LOC) that limited the ability of certain owners of wireless telephone handsets to "unlock" their phones, that is, to circumvent software protections that prevent the owner from connecting to a different wireless network. The bill would reinstate an earlier rule ...
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