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  2. International Mobile Equipment Identity - Wikipedia

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

    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.

  3. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    Anatel, Brazil's telecom regulator, requires the carrier to unlock free of charge the mobile phone if required by the user. After this regulation most telecom operators started voluntarily unlocking the devices as soon as it was purchased so one could leave the store with an unlocked phone. [21]

  4. Type Allocation Code - Wikipedia

    en.wikipedia.org/wiki/Type_Allocation_Code

    The Type Allocation Code (TAC) is the initial eight-digit portion of the 15-digit IMEI and 16-digit IMEISV codes used to uniquely identify wireless devices.. The Type Allocation Code identifies a particular model (and often revision) of wireless telephone for use on a GSM, UMTS, LTE, 5G NR, iDEN, Iridium or other IMEI-employing wireless network.

  5. Central Equipment Identity Register - Wikipedia

    en.wikipedia.org/wiki/Central_Equipment_Identity...

    Reducing mobile phone theft; Reducing the import of devices stolen in other countries; Reducing the presence of counterfeit devices on the market (null IMEI, incorrect IMEI, changed IMEI) Reducing illegal imports of mobile devices (increase in the collection of customs duties) Additionally, CEIR most often contributes to the solution of such ...

  6. 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.

  7. Quickly find your lost cellphone - AOL

    www.aol.com/article/2015/12/29/quickly-find-your...

    You're constantly on your phone and yet, all of a sudden, you can't find it. We've all been there. Someone in the house is hungry, another one is sick, and they're all screaming for your attention.