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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.
Cellular network standards and generation timeline. This is a comparison of standards of wireless networking technologies for devices such as mobile phones.A new generation of cellular standards has appeared approximately every tenth year since 1G systems were introduced in 1979 and the early to mid-1980s.
Thomas Haug (first GSM president) and Philippe Dupuis (second GSM president) during a GSM meeting in Belgium, April 1992. In 1983, work began to develop a European standard for digital cellular voice telecommunications when the European Conference of Postal and Telecommunications Administrations (CEPT) set up the Groupe Spécial Mobile (GSM) committee and later provided a permanent technical ...
GSM-1900 and GSM-850 are used in most of North, South and Central America (ITU-Region 2). In North America, GSM operates on the primary mobile communication bands 850 MHz and 1900 MHz. In Canada , GSM-1900 is the primary band used in urban areas with 850 as a backup, and GSM-850 being the primary rural band.
The following is a comparative list of smartphones belonging to smartphones in the Samsung Galaxy S series line of devices, using the Android operating system. This table is primarily intended to show the differences between the model families of phones in the Galaxy S series.
Unlocked phones command higher resale prices, so can then be sold on at a profit, and can even be used by contract customers. Additionally, online marketplaces (like eBay ) enable box breakers to operate internationally and exploit fluctuations in currencies and price differences between countries.
GSM, or grams per square meter, measures the weight and feel of a fabric. We spoke with experts about the difference between GSM and thread count and how to look for high quality towels.
How difficult these challenges are depends on the differences between systems. When talking about IS-95/GSM multi-mode phones, for example, or AMPS/IS-95 phones, the base band processing is very different from system to system. This leads to real difficulties in component integration and so to larger phones. An interesting special case of multi ...
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