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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.
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 CDMA subscriber identity module (CSIM) is an application to support CDMA2000 phones that runs on a UICC, with a file structure derived from the R-UIM card. By porting the application to the UICC (Universal Integrated Circuit Card), a card with CSIM, SIM , and USIM can operate with all major cellular technologies worldwide.
Unlocking Consumer Choice and Wireless Competition Act; Long title: To promote consumer choice and wireless competition by permitting consumers to unlock mobile wireless devices, and for other purposes. Announced in: the 113th United States Congress: Sponsored by: Sen. Patrick J. Leahy (D, VT) Number of co-sponsors: 5: Citations; Public law
Other competitive cell phone plans include Mint Mobile, which offers a $30/month unlimited data plan, and T-Mobile, which offers the same for $50/month, per U.S. News & World Report. More From ...
OMA DM specification is designed for management of mobile devices such as mobile phones, PDAs, and tablet computers. [5] Device management is intended to support the following uses: Provisioning – Configuration of the device (including first time use), enabling and disabling features
Verizon Wireless offers mobile phone services through a variety of devices. [10] Its LTE in Rural America Program, with 21 rural wireless carriers participating, covers 2.7 million potential users in 169 rural counties. [11] Verizon Wireless announced in 2015 that it was developing a 5G, or fifth-generation, network. [12]
ESNs are currently mainly used with CDMA phones (and were previously used by AMPS and TDMA phones), compared to International Mobile Equipment Identity (IMEI) numbers used by all GSM phones. [1] The first eight bits of the ESN were originally the manufacturer code, leaving 24 bits for the manufacturer to assign up to 16,777,215 codes to mobiles.
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