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Frequencies

zhallart

Jul 14, 2006, 9:19 PM
I need help with GSM tri bands and quad bands.

My understanding is that the 850 and 900 freq. are only useful in the US. while the 1800 and 1900 are the bands used in foriegn countries.

So a tri band will work in any foriegn country.

This is relative to using local SIM cards.

Is this correct?

Thanks

Zart
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scotsboyuk

Jul 15, 2006, 4:00 AM
The U.S. uses the 850 MHz and 1900 MHz bands. Most of the rest of the planet uses the 900 MHz and 1800 MHz bands.
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mrcamp

Jul 16, 2006, 10:57 AM
There are 2 types of triband phones: The North American triband (850/1800/1900) and the eurasian triband (900/1800/1900). So it depends on which one you are asking about. A phone with 900/1800 will give you excellent coverage outside North America. And, one with 850/1900 will give you very good coverage in the US. A quad band phone has all 4 bands. A lot of 3rd word countries only have the 900 band. Most european countries have a mixture of the 900/1800 bands.
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zhallart

Jul 18, 2006, 6:48 PM
I have a v360 with 900-1800-1900. I currently use it as my primary U.S. phone. They make an 850 also but Moto tells me mine is 900, sure.

I also have a v300 same Freq's.

I have used the 300 in Thailand, Colombia, Singapore and the U.S.

I got the 360 so I could direct phone numbers and pictures to the SD flash memory card.

My 360 doesn't seem to have the software to make such a choice. I tried with Moto Inc. and they couldn't help me. I can only use the SIM for numbers and the phone for numbers and pictures.

Also - when I put my Thailand SIM card in the 360 I got "no signal". I had my 300 with me just in case so I immediately changed back to it figuring my 360 had the wrong freq's.

So I am not sur the 360 works in Th. - I...
(continues)
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mrcamp

Jul 18, 2006, 6:55 PM
I believe Thailand is pretty much 900 and if your sim doe snot work in it, it's probably the 850 version and not the 900 version as you were told. If you bought it from a US provider it's very likely the 850 version.

I can't help much with the flash memory part.
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zhallart

Jul 18, 2006, 7:28 PM
THANKS FOR YOUR REPLY.

I agreed with you while in Th. but when I got back I saw the box label as exactly as the v300.

So I further followed up with Moto Inc. and they verified two times it to be 900.

(According to the chart on this site for all countries in the world, Th. DTAC uses only 1800.)

One was by the ICDM (spelling) number inside

Another was the fact that it was made in Singapore. They only make the eurasian model.

Maybe it was in a weak signal area - plus I didn't give it much time or move around. When on vacation no paitence for theat stuff - as well as not being positive it was the same(300)freq. at the time.

Thanks for your reply

Zart
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zhallart

Jul 18, 2006, 7:42 PM
Hi

Just hadd a electronic messaging failure.

You may get this twice.

I followed up on my assertion re: freq's.

Go to 'Links' in the blue column at the left

Find GSM association near bottom of page

On tool bar choose 'GSM Roamng'

On drop down choose 'GSM Coverage Maps'

Go to Thailand

Thailand

DTAC uses 1800
ACT GSM uses 1900
AIS GSM uses 900

My v360 has 1800 and I have a DTAC SIM card so the 850/900 issue should not affect me anyways.
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bweiss

Oct 18, 2006, 10:51 AM
I'm going to Zimbabwe in December and would like to use my US-purchased triband phone (Nokia 6102b) there. I've managed to unlock it, but I don't know how to change the frequency (there's no mention of this in the manual). Does the phone do this automatically?
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mrcamp

Oct 18, 2006, 5:06 PM
bweiss, your band selection is probably on automatic, so it will select the appropriate band when turned on in your destination. That phone does not have the 900 band though, which may be used extensively in Zimbabwe. In the US (N. America) we use 850/1900, pretty much the rest of the world used 900/1800, and I believe your phone is 850/1800/1900. Most of Africa is 900 ONLY. Not sure about Zimbabwe. Check GSM world.
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bweiss

Oct 22, 2006, 12:07 PM
You're right, mrcamp. I checked GSM World and Zimbabwe networks are all on 900Hz. Thanks!
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littlefuzzbear

Jul 18, 2006, 6:13 PM
zhallart said:
I need help with GSM tri bands and quad bands.

My understanding is that the 850 and 900 freq. are only useful in the US. while the 1800 and 1900 are the bands used in foriegn countries.

So a tri band will work in any foriegn country.

This is relative to using local SIM cards.

Is this correct?

Thanks

Zart


Not quite. 850 and 1900 are the frequencies used in North America and parts of South America except for Cuba which uses 900.

900 and 1800 are used in Europe and in Asia mostly with a few countries in South America that use 900 or 1800 (such as Brazil.)
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Rich Brome

Aug 25, 2006, 10:04 AM
Correct. Smile
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scubadvr1

Aug 19, 2006, 9:08 AM
I lived in Thailand and was able to connect with DTAC with my v600, which was a quad band. If you are using DTAC, it depends what area of Thailand you are in. I was working in Bangkok and was able to connect to DTAC in Phuket. I was NOT able to in koh Samui and was transferred to AIS (900 band). If you are in the North near Chang Mai, I heard DTAC works but it's selective. If you are in the hills, forget it, the selection is rough with dead spots.

Bottom line, it could be you were duped with the phone regardless what is labelled on the box or depending on where in Thailand, you can get a variable signal. It's happened to me all the time when I was there.
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