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Digital vs Tri-mode phones?

caddyman

Aug 1, 2004, 9:10 PM
Can someone explain the advantages of one over the other? I'm thinking tri-mode gives a greater capability in terms of searching for and receiving signals and avoiding dropped calls. Some of the supposed top phones Verizon offers are 'all digital' or 'digital handset' phones. Would this be something to avoid if I can get one with tri-mode instead? Please excuse my ignorance.
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sammy2

Aug 2, 2004, 8:47 AM
see my posting in the general category with the title of ATT cell phone saves hiker.
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Rich Brome

Aug 3, 2004, 8:07 PM
Tri-mode phones include an analog mode.

Analog mode sounds worse, uses more battery life, emits more radiation, and doesn't support any advanced features like text messaging, data, etc.

For those reasons, your phone will always use digital mode whenever it can. And in most reasonably populated areas, digital will provide you with adequate coverage, so there will be no difference.

But as you get more rural, there are still areas where there are analog-only towers and no digital coverage. That's when a tri-mode phone will switch to analog mode, whereas an all-digital phone would not get signal at all.

It really depends on the areas you use your phone. If you need coverage in the middle of nowhere, you'll want the tri-mode phone. If...
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caddyman

Aug 3, 2004, 8:29 PM
Thank you for the reply, Rich.
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sammy2

Aug 4, 2004, 12:28 PM
In addition, an analog signal will travel a greater distance.
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rukshanw

Aug 26, 2004, 11:53 PM
Smile Greetings. Ok. First off let me get some out in the open. A TRI-MODE PHONE IS A DIGITAL PHONE. There are 2 different frequencies that a Digital phone will run at 800Mhz and 1900Mhz in TDMA and 800Mhz and 1900Mhz in CDMA. The diff between TDMA and CDMA is the way the signal is processed. One uses time pulses to handle many conversations at once and CDMA applies a pseudorandom code to each simultatneous conversation (to explain it in very very brief). So anyway - then other than for the two types of Digital, TDMA and CDMA, there is the grand puba of cellular, Analog.
A tri-mode phone uses both the cellular frquencies AND the Analog portion as its full spectrum. On both TDMA and CDMA. So a TDMA Tri-mode will work on 800Mhz,1900Mhz and Ana...
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caddyman

Aug 30, 2004, 9:08 AM
This is a vary complete response to my original question. I really appreciate your feedback. Thank you, Rukshan.
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rukshanw

Aug 30, 2004, 9:13 AM
Smile Glad to be of help.

+=+=+=+=+=+
=_Rukshan_=
+=+=+=+=+=+
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RustyNeal

Nov 1, 2012, 3:30 PM
Rukshan,
I'm an IT professional and followed everything you provided about the CDMA/TDMA signaling differences and the frequency information. I hope you may be able to clarify something that a store technician told me that goes against the grain.
Based on the information you provided, a phone that has say LTE 750, WCDMA 850/900/1900/2100, CDMA 850/1900, and GSM 850/900/1800/1900 capabilities: if it leaves the contracted carriers tower footprint and roams into another carriers footprint that has one of the technologies/frequencies that the phone is capable of communicating on, will it be able to use the other carriers technology/frequency to establish a call? (I understand that there may be additional roaming charges, but will...
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sic

Nov 9, 2012, 10:00 PM
The information is probably obsolete.
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Fredd

Nov 14, 2012, 12:29 PM
And such necroposting likely also disputes his claim to be "an IT professional"
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melrhodes

Nov 17, 2012, 1:20 PM
Shocked
Laughing Laughing Laughing
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sammy2

Aug 30, 2004, 3:07 PM
From mountain wireless refering to the issue in general and specifically to the mountain states:

Analog will be with us for some time. The FCC mandate is 2/17/2008, which may be extended yet again. But many carriers in the west get thousands in revenue from analog roamers, so they are not in any hurry to cut this off. Also, OnStar uses analog in all cars until the mid-2004 model year.

The "push" to all-digital phones is led by manufacturers who are trying to pack all these hot new features into ever smaller phones, and feel like analog could be dropped out, and carriers want to keep customers happy by offering these feature-packed phones. But that does not mean analog towers will be going away even if the FCC no longer requires it...
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BowWowWow

Aug 30, 2004, 5:07 PM
I thought AT&T went with TDMA because that's what McCaw Cellular was using when AT&T bought them in the mid 1990s? I didn't know DCM was involved with that momentous decision...
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sammy2

Aug 30, 2004, 5:22 PM
Apparently so.

In the last decade I have seen AT&T make an assortment of very poor decisions. We shall see how this turns out for ATTW.
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