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An interesting special case of multi-mode phones is the WCDMA/GSM phone. The radio interfaces are very different from each other, but mobile to core network messaging has strong similarities, meaning that software sharing is quite easy. Probably more importantly, the WCDMA air interface has been designed with GSM compatibility in mind.
Forms of technology addiction have been considered as diagnoses since the mid 1990s. [3] In current research on the adverse consequences of technology overuse, "mobile phone overuse" has been proposed as a subset of forms of "digital addiction" or "digital dependence", reflecting increasing trends of compulsive behavior among users of technological devices. [4]
These phones include combination of GSM and CDMA technology. They can be used as a GSM or CDMA phone according to the user's preference. These handsets are also called global phones. An example of this is the Samsung SCH-A790. These dual-mode handsets are compatible with both GSM and CDMA networks and are essentially two phones in one device.
Nomophobia [1] (short for "no mobile phobia") is a word for the fear of, or anxiety caused by, not having a working mobile phone. [2] [3] It has been considered a symptom or syndrome of problematic digital media use in mental health, the definitions of which are not standardized for technical and genetical reasons.
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.
4G is the current mainstream cellular service offered to cell phone users, performance roughly 10 times faster than 3G service. [ 4 ] One of the most important features in the 4G mobile networks is the domination of high-speed packet transmissions or burst traffic in the channels.
The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation digital cellular networks used by mobile devices such as mobile phones and tablets. GSM is also a trade mark owned by the GSM Association. [2] "
Two decades of evolution of mobile phones, from a 1992 Motorola DynaTAC 8000X to the 2014 iPhone 6 Plus. A mobile phone, or cell phone, [a] is a portable telephone that allows users to make and receive calls over a radio frequency link while moving within a designated telephone service area, unlike fixed-location phones (landline phones).