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  2. GSM frequency bands - Wikipedia

    en.wikipedia.org/wiki/GSM_frequency_bands

    For example, one version of the Nokia 6340i GAIT phone sold in North America can operate on GSM-1900, GSM-850 and legacy TDMA-1900, TDMA-800, and AMPS-800, making it both multi-mode and multi-band. As a more recent example the Apple iPhone 5 and iPhone 4S support quad-band GSM at 850/900/1800/1900 MHz, quad-band UMTS/HSDPA/HSUPA at 850/900/1900 ...

  3. Multi-band device - Wikipedia

    en.wikipedia.org/wiki/Multi-band_device

    The term quad-band describes a device that supports four frequency bands: the 850 and 1900 MHz bands, which are used in the Americas, and 900 / 1800, which are used in most other parts of the world. [1] Most GSM/UMTS phones support all four bands, while most CDMA2000/1xRTT phones (mostly North America and voice transmission only) do not, and so ...

  4. Palm Treo - Wikipedia

    en.wikipedia.org/wiki/Palm_Treo

    A Treo 300. The Palm Treo / ˈ t r iː oʊ / (stylized as Trēo) is a discontinued line of smartphones originally developed by Handspring, which was bought by Palm, Inc. They were then manufactured and maintained by Palm, Inc. Treos had a number of integrated features such as the ability to check the calendar while talking on the phone, dial directly from a list of contacts, and send email ...

  5. Palm Treo Pro - Wikipedia

    en.wikipedia.org/wiki/Palm_Treo_Pro

    The phone originally was released in an unlocked GSM format. The updated release of the phone for CDMA networks featured new hardware specifications, including a more powerful processor, more storage, and less user-available RAM. Mobile phone, CDMA model with 800/1900 MHz bands, with EV-DO Rev.A data. Unlocked GSM model also available

  6. Motorola Photon - Wikipedia

    en.wikipedia.org/wiki/Motorola_Photon

    The Photon is an international capable phone ("world phone"), meaning that besides using Sprint's CDMA/EV-DO network and other CDMA networks accessible internationally and through domestic roaming; it accepts a GSM SIM card with quadband GSM and triband UMTS/WCDMA/HSPA+ capabilities.

  7. Mobile phone feature - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_feature

    Tri-band means 850 / 1800 / 1900 MHz or 900 / 1800 / 1900 MHz. Quad-band means 850 / 900 / 1800 / 1900 MHz, also called a world phone, since it can work on any GSM network. Multi-band phones have been valuable to enable roaming whereas multi-mode phones helped to introduce WCDMA features without customers having to give up the wide coverage of GSM.