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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.
Dual SIM phones are mainstream in many countries where phones are normally sold unlocked. Dual SIMs are popular for separating personal and business calls, in locations where lower prices apply to calls between clients of the same provider, where a single network may lack comprehensive coverage, and for travel across national and regional borders.
There is a large amount of research on mobile phone use, and its positive and negative influence on the human's psychological mind, mental health and social communication. Mobile phone users may encounter stress, sleep disturbances and symptoms of depression, especially young adults. [52]
More than 114,000 people signed the We the People petition asking the White House to decriminalize the unlocking of cell phones. That cry was heard, answered, and clearly agreed with by the ...
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.
If the wrong PIN is entered more than three times, the SIM card will become locked. It can be unlocked by entering the PUK code provided by the mobile service provider, [1] which may be available on the SIM card's packaging, the contract, or provided by customer service after identity verification. After the PUK code is entered, the PIN must be ...
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] "
A phone with a broken display. 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.