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2. Emergency telephone number - Wikipedia

   en.wikipedia.org/wiki/Emergency_telephone_number

   Most GSM mobile phones can dial emergency numbers even when the phone keyboard is locked, the phone is without a SIM card, emergency number is entered instead of the PIN or there is not a network signal (busy network). Most GSM mobile phones have 112, 999 and 911 as pre-programmed emergency numbers that are always available.

3. 112 (emergency telephone number) - Wikipedia

   en.wikipedia.org/wiki/112_(emergency_telephone...

   112 is a common emergency telephone number that can be dialed free of charge from most mobile telephones, and in some countries, fixed telephones in order to reach emergency services (ambulance, fire and rescue, police). 112 is a part of the GSM standard and all GSM-compatible telephone handsets are able to dial 112 even when locked or, in some ...

4. Phone cloning - Wikipedia

   en.wikipedia.org/wiki/Phone_cloning

   GSM cloning occurs by copying a secret key from the victim SIM card, [3] typically not requiring any internal data from the handset (the phone itself). GSM handsets do not have ESN or MIN, only an International Mobile Equipment Identity (IMEI) number. There are various methods used to obtain the IMEI. The most common method is to eavesdrop on a ...

5. 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. This is in contrast to a phone (retrospectively called SIM-free or ...

6. Prepaid mobile phone - Wikipedia

   en.wikipedia.org/wiki/Prepaid_mobile_phone

   Prepaid mobile phone. A prepaid mobile device, also known as a pay-as-you-go ( PAYG ), pay-as-you-talk, pay and go, go-phone, prepay or burner phone, is a mobile device such as a phone for which credit is purchased in advance of service use. The purchased credit is used to pay for telecommunications services at the point the service is accessed ...

7. The next generation of phones will make SIM cards obsolete

   www.aol.com/article/2015/07/17/the-next...

   The era of the SIM card might be about the end. That little plastic card that allows your phone to connect to a specific carrier is about to be replaced by what Samsung and Apple called ...