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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.
No SIM card due to operator-specific device. The Samsung SCH-u470 , or Juke and Verizon Wireless Juke , is a mobile phone offered exclusively by Verizon Wireless . It was announced on 2 October 2007, and released that same year on Q4 in three colors: red, teal, and navy (blue). [ 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).
The Broadband Global Area Network (BGAN), Iridium and Thuraya satellite phone networks all use IMEI numbers on their transceiver units as well as SIM cards in much the same way as GSM phones do. The Iridium 9601 modem relies solely on its IMEI number for identification and uses no SIM card; however, Iridium is a proprietary network and the ...
The rear slot usually reserved for a full-sized (1FF) SIM card would instead take an EMV debit card or credit card. This was possible as both 1FF SIM cards and debit/credit cards met the same ISO/IEC 7810 specifications. The phone accepted a 2FF mini SIM card behind the battery for mobile network
Easyfone Prime-A1 Pro 4G Easy-to-Use Flip Cell Phone, 2.4'' HD Display, Big Buttons, Clear Sound, Large Fonts, SOS Button, SIM Card Included, Dumbphone with 1500mAh Battery and a Charging Dock (Black)
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