In telecommunications , a multi-band device (including ( 2 ) dual-band , ( 3 ) tri-band , ( 4 ) quad-band and ( 5 ) penta-band devices) is a communication device (especially a mobile phone ) that supports multiple radio frequency bands. All devices which have more than one channel use multiple frequencies; a band however is a group of frequencies containing many channels. Multiple bands in mobile devices support roaming between different regions where different standards are used for mobile telephone services. Where the bands are widely separated in frequency, parallel transmit and receive signal path circuits must be provided, which increases the cost, complexity and power demand of multi-band devices.
6-729: The Nokia E50 Business Device is a bar-style monoblock quad-band mobile phone from Nokia announced 18 May 2006 as part of the Eseries , intended primarily for the corporate business market. It includes sophisticated e-mail support for Nokia's Intellisync Wireless Email, BlackBerry Connect, Visto Mobile, Activesync Mail for Exchange , Altexia as well as IMAP4. It also has the ability to view Microsoft Word, PowerPoint, and Excel attachments, and PDF documents but it cannot be used for editing these without additional apps. An application manager downloads, removes and installs both Nokia and third-party applications. Device to device synchronization
12-692: Is not binary compatible with software compiled for earlier versions of the Symbian operating system. Check firmware V 07.36.0.0 Quad band 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. Most GSM / UMTS phones support all four bands, while most CDMA2000 /1xRTT phones (mostly North America and voice transmission only) do not, and so are considered only dual-band devices. A few phones support both of
18-535: Is possible with Data transfer application. Features include EDGE , Bluetooth 2.0, a 1,280 × 960 pixels (1.3-megapixel) camera, a MicroSD memory-card slot, and digital music and video player functionality through RealPlayer and Flash Player. This unit does not support UMTS , Wi-Fi , or FM radio . It uses the third edition of the Series 60 user-interface (S60v3) and the Symbian operating system version 9.1. It
24-492: The 1700 MHz or 2100 MHz bands. AT&T Mobility devices use former TV channel 53 and 54 nationwide and has purchased spectrum from former TV channel 55 nationwide (purchased from Qualcomm 's defunct MediaFLO pay TV service), and also channel 56 in densely populated areas such as California and the Northeast Corridor . Verizon Wireless formerly held frequencies just above TV channel 51, which
30-477: The 700 MHz band, which was reallocated from TV broadcasting during the DTV transition . TV stations were forced to move to lower UHF and even far worse VHF frequencies with poorer mobile TV and even regular terrestrial TV performance , because the 700 MHz band has better radio propagation characteristics that allow mobile phone signal to penetrate deeper into buildings with less attenuation than
36-489: The domestic frequencies but only one foreign one for limited roaming , making them tri-band phones. The term penta-band describes a device that supports a fifth frequency band, commonly the 1700/2100 MHz band in much of the world. The Advanced Wireless Services (AWS) 1700 MHz band is also seeing increased usage. In the United States only, the two largest carriers are instead implementing 4G LTE in
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