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AT&T: iPhone to Get MMS September 25

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Once they move all data to 850 MHZ things will be better.

ATnT Nokia

Sep 3, 2009, 4:22 PM
Right now everything is on the 1900 MHZ, which is why us non-iPhone users are also being affected by call quality issues. AT&T should have had all data on one spectrum and all voice on another so that if something goes wrong people can still be connected with voice.
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Rich Brome

Sep 3, 2009, 6:06 PM
I'm pretty sure it's better that all spectrum be in use, for both voice and data. Why would you want all data on just one band? Whenever something "goes wrong", like an outage, it's usually something in the core network - not the radio side - and therefore affects both bands equally.

Besides, I'm not even sure that's possible. You could put GSM on one band and WCDMA (3G) on the other band, but I don't think you could split it up by voice vs. data. (Keep in mind that both GSM and WCDMA support both voice and data.)

Also, while 850 reaches farther, allowing one tower to cover more area, that's irrelevant in dense urban areas where the towers are tightly spaced (assuming they're spaced correctly, which can be an issue.) In fact, in most a...
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Jayshmay

Sep 3, 2009, 8:24 PM
So Rich your saying that in a metro area that ATT has a lot of bandwidth in the 1900 band someone could potentially be getting better speeds than someone who lives in one of the cities with 850 3G? And btw, how much bandwidth a perticular cell site has depends on how many T1 lines are going to a perticular cell tower, correct?
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Rich Brome

Sep 3, 2009, 8:48 PM
Jayshmay said:
So Rich your saying that in a metro area that ATT has a lot of bandwidth in the 1900 band someone could potentially be getting better speeds than someone who lives in one of the cities with 850 3G?

Potentially, sure. Ideally, if a carrier is using all of their spectrum optimally, then more total bandwidth in a city means it's less likely that the network will get overcrowded and slow down for people. It shouldn't matter too much which band as long as the network is designed properly. For the most part, bandwidth is bandwidth.

Of course it's not really that simple. You need radio equipment for each technology and each band at each tower site in order to do that. AT&T ran into trouble ...
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Jayshmay

Sep 3, 2009, 10:30 PM
Ah. . .thank you for the lesson Professor Brome.

Sidenote: I'm working OT @ the new Hard Rock on the strip tonight, and I got to play with the Microsoft Surface, way, way cool! ! ! And a wall size Surface also, way, way cool! ! ! It was my 1st time playing with a Surface.
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bluecoyote

Sep 3, 2009, 8:31 PM
I believe their network divides data and voice giving priority to voice.

The 850 is going to put less strain on a particular frequency and should improve signal strength, however.
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michael_herc

Sep 3, 2009, 9:06 PM
I think a lot of people are under the false impression that just because AT&T is moving some markets over to the 850 MHz band, that they are going to be doing it everywhere. AT&T cannot possibly do this because in many markets, AT&T does not own any cellular licenses and must rely solely on PCS spectrum. So, to say that everything will get better once it's on 850, is wrong. In many areas, people will only ever have 1900-only.
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