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2. SIM lock - Wikipedia

   en.wikipedia.org/wiki/SIM_lock

   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.

3. Sanchar Saathi - Wikipedia

   en.wikipedia.org/wiki/Sanchar_Saathi

   Sanchar Saathi is an Indian government web portal, owned and operated by Department of Telecommunications, to help Indian mobile users to track and block lost smartphones and identity theft, forged KYC, using the CEIR module. [1] Users get a request ID to check and potentially unblock the IMEI in the future. [2]

4. Personal unblocking key - Wikipedia

   en.wikipedia.org/wiki/Personal_unblocking_key

   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.

5. International Mobile Equipment Identity - Wikipedia

   en.wikipedia.org/wiki/International_Mobile...

   To make blocklisting effective, the IMEI number is supposed to be difficult to change. However, a phone's IMEI may be easy to change with special tools. [10] [better source needed] In addition, IMEI is an un-authenticated mobile identifier (as opposed to IMSI, which is routinely authenticated by home and serving mobile networks.) Using a ...

6. International mobile subscriber identity - Wikipedia

   en.wikipedia.org/wiki/International_Mobile...

   This is mainly important for international mobile roaming. Outside North America, the IMSI is converted to the Mobile Global Title (MGT) format, standard E.214, which is similar to an E.164 number. E.214 provides a method to convert the IMSI into a number that can be used for routing to international SS7 switches.

7. Android app lets parents lock, monitor their kids' phones - AOL

   www.aol.com/news/2014-08-17-android-app-lets...

   Parental punishments have officially gone digital. Ignore No More is an app created by a Texas mother Sharon Standifird that allows parents to lock their child's phone with a simple four-digit code.