Sony Ericsson S710a

LOL 😁

it was said that because it has the 850 band it would be with cingular, what does it have to have to be on T-Mobile? what is the difference between the two companies and frequency ??

Cingular operates a large GSM 1900 network (typically on the coasts). However, their "Genesis" network in the Central/Midwest region operates on GSM 850 (some generically call this GSM 800 - the two are synonymous). Tri-band phones with GSM 900/1800/1900 will work on a majority of US GSM carriers and others worldwide - but won't work on some of Cingular's network. Tri-band GSM 850/1800/1900 will work on any US GSM carrier (including all of Cingular's network) and most around the world. Quad-band phones have the best of it all - GSM 850/900/1800/1900 - and can work on any GSM network in the world. 😳 Catch all that? 😁

I would disagree that just because the phone has 850 means that it must be going to Cingular. Every carrier in the worl...
(continues)

And to specify one last thing - all of the T-Mobile USA network runs on GSM 1900 (Most US GSM carriers do - 'cept Cingular as previously mentioned. After writing all of that in the last message, I dodge your one true question! Doh! 🙂

T-Mobile USA: GSM 1900
Cingular: GSM 850 and 1900
ATT Wireless: 1900
*Nearly every other US GSM Carrier: 1900 - there are a few itty-bitty carriers running with 850 other than Cingular - but not enough to measure.

Actually, AT&T Wireless has a good amount of GSM 850 coverage as well.

First and foremost AT&T started on 1900, just as Cingular did as well, than later onboth companies started to use GSM 850. What people fail to notice is that most of the phones in the worlds such as this one are already released, and only T-Mobile and AT&T can use the factory unlocked phones in areas where Cingular is GSM 850.

I live in Florida and there is only GSM 850 for Cingular. So there are so many limitations to what phones you can have or not. With T-mobile you can have any phone you want whenever you want it. Every high end GSM 850 phone has its tri-band predecessor such as this one, which is the S700i. Which was just released this week and available for purchase. Take that Cingular!

Take that Cingular?? 😳

Using the 850 frequency means having less interference, superior signal strength and as a result, better reception all around. If you want to pride yourself on a completely 1900 based network (Tmobile) then go ahead. Good luck trying to get any service around New York.

First of all, the 850 frequency is barely built up, and I live in Florida in which Cingular only uses the 850 frequency. Second, I am a dealer for both T-mobile and Cingular because they are GSM carriers and in my store there are is a ratio of 5 to 1. For every 5 activations for T-Mo we get 1 Cingular. Third, Cingular is horrible in New York no one has it. Everyone has something else but Cingular.

Cingular Roams offa TMO in Newyork 🙂. TMO roams offa cingular in cali... they share alota coveage dude. I have both TMO and cingular here in cali and there is virtually no difference coverage wise. Now about the ratio thing, I think itz cause of Tmo's Spokes Woman 🙂 Catherine Zeta-Jones! Lol not really, TMO has cheap rates, and only One Yr contracts, thats gotta attract alotaa customers.

cingular has one year contracts also, you in most cases you just pay more for the handsets up front.

Correction... AT&T uses GSM 850 as well. The 850 (or 800) means that it was a cellular market... when wireless companies started ALL of them were 850... then the FCC opened up the 1900 spectrum. T-Mobile came along after that and have always used it. If Cingular would not have emerged from a cellular company, then the would have used 1900 through out. Take the Carolinas for expample, even before Cingular switched the whole company to GSM from TDMA that whole area was 1900 GSM...

T-Mobile has shown very little interest in GSM 850. They don't have any roaming agreements that include 850 (all of their Cingular roaming is 1900-only the last time I checked). And T-Mobile routinely disables 850 on phones that would otherwise have it (like the Motorola V600).

Sounds like T-Mobile doesn't like 850.

Actually, T-mobile doesn't "like" 850 because all of their licenses are in the 1900 band. If they allowed phones to roam on 850 then they would have huge roaming costs associated with their use. Unfortunately for T-mobile customers, this probably will not be resolved.

As for Cingular and AT&T, they are simply leveraging their older 850 networks that used to be TDMA and analog before that. They have simply "overlaid" the legacy networks with GSM functionality.

So what happens to attws customers in places like nw ohio where attws is 1900 😕 and there is it no cingular.(But tmo coverage is great here) Do they keep them 1900? and if they do what about the people that travel outside their calling area, where cingular ONLY has 850?? It sounds like cingular is going to have some issues to iron out before it has a uniformed network.

DUAL BAND PHONES! They support 850 and 1900. Most of the phones now a days support both of those frequencies as well and the 900/1800 bands for international. What kinda phone do you have now? I know ATTWS has been selling dual band for quite some time. Reguardless Im sure cingular will have a way for you to get a new phone if needed.

Nice Phone 😁 I Hope Cingular Do Get It If So It Will Be A Must Have For Me 😁