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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 ...
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 ...
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 ...
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
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.
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.