A Tri-band phone is a phone that operates on three frequency bands, for example, Global System for Mobile communication (GSM) 900MHz, GSM 1800MHz, and GSM 1900MHz. A GSM tri-band phone can be widely used in Europe, Africa, Asia, North America, and Australia, because the same phone can be used on different networks using different frequency bands.

Most phones these days are sold as dual-band or tri-band phones. If you've bought your phone from the UK the chances are that your phone will work anywhere in Europe, Africa or Asia (a dual-band phone). AND maybe even the US and Canada (tri-band phone). If you are experiencing difficulties ordering online please contact us via email or telephone customer support on 0870 600 1362. Our lines are open 24/7 and someone will get back with you during regular working hours to take your order.

It is peripheral specific. For example thru a USB peripheral it is Quad-band and thru Compact Flash it is Tri-band.

Dual band phones tend to work in the UK and Europe and most of the world (GSM 1800 and GSM 900), whilst in America you need a phone that can take GSM 1900 so most often a Tri band or Quad band phone is the best option.

You can get a dual band antenna that will cover all 3 modes (analog, digital cellular and digital pcs) or, as mentioned above, focus on where you're having reception problems. First find out what network your phone is actually using in your city by calling your service provider. Just ask if you're in a 800MHz range area or 1900MHz range area.

A tri-band phone operates at three supported frequencies, such as 900/1800/1900 MHz or 850/1800/1900 MHz. A dual-band phone operates at two frequencies, such as 850/1900 MHz or 900/1800 MHz.

TRI stands for Trisomy 21 Research Foundation, Inc., a non-profit organization founded by Dr. Lawrence Leichtman to further investigate TNI as a therapeutic treatment for patients with Down syndrome and encourage further research.

Tri band refers to the physical frequencies which your mobile phone can operate on. The three international frequencies ranges or bands reserved for GSM are 900MHz, 1800MHz and 1900MHz. A Tri Band phone is what you will need to use in the US. They use GSM 1900 there, just to be different (for a change).

A phone that is capable of utilizing all three of the Verizon Wireless systems, analog, CDMA digital or PCS digital. The advantage of tri-mode wireless phones is their capability to work on Digital, PCS (Personal Communication Service), and analog networks. These handsets automatically connect you to the best service option in any given location to ensure the best possible connection given the respective local network coverage.

GSM handsets must meet the following criteria: GSM 1900 megahertz (MHz). Federal Communication Commission (FCC) Approved. The handset is not locked to another carrier's network

This lets the public know which service provider the phone will work best. Dual band phones usually works on only one providers network while the Tri Band phone works on multiple networks but weeker on one due to the absent of a band. The quad band phone is ideal because it will work very good on the two GSM networks used in Jamaica.

These terms define the working frequencies of GSM cellular phones on particular networks. There are 3 working frequencies - 900/1800/1900. GSM phones that work on 2 frequencies are called dual band while those that work on 3 frequencies are called tri-band. This facility allows the user to use his/her cell on different networks, and beneficial for international roaming.

Tri EndoLean should be taken twice per day before the first meal and lunch. Begin by taking one capsule with Breakfast for three days. Once acclimated to the effect of Tri EndoLean, one capsule should be taken with Breakfast and one before Lunch. After another three days, you can increase the dosage to 2 capsules with breakfast and 2 capsules with lunch. If at any time the user experiences insomnia, the second dose in the day should be reduced from 2 capsules back to one capsule.

Tri band refers to the physical frequencies which your mobile phone can operate on. The three international frequencies ranges or bands reserved for GSM are 900MHz, 1800MHz and 1900MHz. In Australia, as at the time of publication, most GSM networks still use only the 900MHz frequency band. Soon, GSM carriers will be upgrading their networks to support the 1800MHz band also.

The Vodafone Datacard is a quad-band card GSM 850/900/1800/1900. The Vodafone USB Modem is Tri-band GSM 900/1800/1900.

MTNL's Broadband service is called as "Tri-Band". This is based on ADSL 2+ technology which is the most advanced technology in the world.

Almost all the phones on www.simoncells.com are brand new. If a phone is marked "refurbished" or "RB" than the phone has been rebuilt by its manufacture.

A Quad-band GSM phone operates on the four internationally designated GSM frequencies- 850, 900, 1800 and 1900 MHz. The capability to seamlessly handover between the four bands offers operators major capacity gains. The 850 frequency is used in North America, Latin America and parts of the Caribbean.