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  2. Comparison of mobile phone standards - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_mobile_phone...

    3G: W-CDMA: UMTS (3GSM) Digital: 2001 Worldwide SIM card: None Smaller cells and lower indoors coverage on 2100 MHz; equivalent coverage indoors and superior range to GSM on 850/900 MHz. Very low density Soft Yes [3] 4G: OFDMA: LTE: Digital: 2009 Worldwide SIM card: None Smaller cells and lower coverage on the S band. Very low density Hard No ...

  3. List of wireless network technologies - Wikipedia

    en.wikipedia.org/wiki/List_of_wireless_network...

    CDMA2000 is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. It is a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in North America and South Korea, China, Japan, Australia and New Zealand.

  4. Cellular frequencies in the United States - Wikipedia

    en.wikipedia.org/wiki/Cellular_frequencies_in...

    Professional wireless microphones used the 700 MHz band until 2010 when they were made illegal, but equipment still exists in use that may interfere with 3G and 4G technologies. [10] Due to immediate adjacency to channel 51 lower 700 MHz A block license holders were prohibited to use it within channel 51 station service areas.

  5. Screensaver - Wikipedia

    en.wikipedia.org/wiki/Screensaver

    Einstein@Home interactive screensaver. A screensaver (or screen saver) is a computer program that blanks the display screen or fills it with moving images or patterns when the computer has been idle for a designated time. The original purpose of screensavers was to prevent phosphor burn-in on CRT or plasma computer monitors (hence the name). [1]

  6. LTE Advanced - Wikipedia

    en.wikipedia.org/wiki/LTE_Advanced

    LTE Advanced (LTE+, LTE-A; [1] on Samsung Galaxy and Xiaomi phones4G+) is a mobile communication standard and a major enhancement of the Long Term Evolution (LTE) standard. It was formally submitted as a candidate 4G to ITU-T in late 2009 as meeting the requirements of the IMT-Advanced standard, and was standardized by the 3rd Generation ...

  7. Smartphone patent wars - Wikipedia

    en.wikipedia.org/wiki/Smartphone_patent_wars

    The pattern of suing and countersuing really began in 2009 as growth in the demand for smartphones accelerated dramatically with the advent of the modern smartphone, which combined a responsive touch screen with a modern multi-tasking operating system, a browser that provided full web access and an application store, in the form of the Apple iPhone 3G and the first Android phones.

  8. iPhone 3G - Wikipedia

    en.wikipedia.org/wiki/IPhone_3G

    The iPhone 3G features an internal rechargeable battery rated at 1150 mAh, which, like its predecessor, is not user-replaceable. Apple stated that the iPhone 3G's battery is capable of providing up to six hours of web browsing via Wi-Fi, or five hours via 3G, or 25 hours of audio playback. Alternatively, it is said to provide 300 hours of ...

  9. Cellular frequencies - Wikipedia

    en.wikipedia.org/wiki/Cellular_frequencies

    In Russia and some other countries, local carriers received licenses for 450 MHz frequency to provide CDMA mobile coverage area. Many GSM phones support three bands (900/1,800/1,900 MHz or 850/1,800/1,900 MHz) or four bands (850/900/1,800/1,900 MHz), and are usually referred to as tri-band and quad-band phones, or world phones; with such a ...