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In New Zealand, we have two networks, Vodafone and Telecom. Vodafone phones use Sim cards, and telecom phones don't.

Am I correct in saying that the ones with sim cards are GSM phones? If so, what are the Telecom ones called?

And, howcome I cannot tell my Vodafone K800i to latch onto the Telecom network? Or vice-versa?
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Posted: 2007-10-23 07:11:19
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hi

gsm operators use simcards. the others are called cdma.
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Posted: 2007-10-23 12:59:14
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@humph:

trance is right.
CDMA also operates on another bandwidth, just like GSM but not similar.
CDMA is actually the standard in the US.
GSM uses SIM cards, CDMA does not (think of Cingular, etc.).

just some thoughts. thought these might help...

cheers, mate!

[ This Message was edited by: aldrinus on 2007-10-23 13:07 ]
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Posted: 2007-10-23 14:06:40
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Well, TDMA (I doubt if anyone still provides this service) doesn't use a SIM either.

CDMA is not the standard in the US. Sprint and Verizon use CDMA though.

AT&T (formerly Cingular) is GSM and the only 3G provider in the US as far as I know.

T-Mobile is GSM too in the US.

Nextel(Owned by Sprint) is based on iDEN (if I am not wrong) and uses a SIM card too.

[ This Message was edited by: rambalu80 on 2007-10-23 16:06 ]
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Posted: 2007-10-23 17:05:22
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OK, that's good, thanks for answering, but what about the second part of the question -

Howcome GSM phones can't hook onto CDMA networks or vice-versa?

And, now that I am here, which network is better? Haha.
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Posted: 2007-10-23 21:41:40
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GSM uses information from the users SIM card to allow access the the network and determine what services the user gbp access to-CDMA uses purely info from the phone to do the same! Plus the operating frequence of both are different. However, GSM customers can use WCDMA which is a combo of the 2 technologies, where as CDMA customers can't! Hope that makes sense! :-)

This message was posted from a N95-1
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Posted: 2007-10-23 21:59:56
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In new zealand

You have 2 GSM Networks. A new one will be lauched in December this year
Called:
Northelia Holdings Limited, this will run on GSM 1800 and is launcher Dec 07

Vodafone runs on the following Bands, GSM 900, GSM 1800 and 3G 2100

GSM and CDMA run on different systems and freq all together
eg

To put it easier. GSM is DAB Radio (Digitial)
CDMA is FM Radio

So they use differnt systems alltogether.

3G is bits of both technologies placed into one, but its WCDMA, which is an enancement of GSM. GSM is 2G, WCDMA is called 3G, which is 3GSM or third Generation

"The technology on which 3GSM services are delivered is based on a GSM network enhanced with a Wideband-CDMA (W-CDMA) air interface"

Hope this makes sense.

CDMA is a dying Technology now and most of the world uses GSM

GSM is 82% of the worlds population and is ava in 218 countries with over 700 networks

If you want to know any more or for any other networks worldwide please ask.


Hope this helps



[ This Message was edited by: darrengf on 2007-10-23 21:27 ]

[ This Message was edited by: darrengf on 2007-10-23 21:30 ]
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Posted: 2007-10-23 22:26:50
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@darren:

thanks for the information. i learned a lot...

cheers!
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Posted: 2007-10-24 06:10:47
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Yeah, thanks darren. That's quite interesting.

So, basically, if you have a GSM phone, there is NO way to ever be able to connect to CDMA? Not even by hacking/firmware changes etc etc?


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Posted: 2007-10-26 06:58:36
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@humph:

haven't heard anything similar. that would be wonderful if that would work (through FW and some HW, i guess).

but one thing i know is that you can't use a CDMA unit in GSM standards since there's no SIM slot (there goes the HW tweaking...)!

i have relatives in the US who keep on bringing home CDMA units much to my dismay although they are almost new, they're practically useless here since the Philippines uses GSM.

hope this helps. cheers, mate!
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Posted: 2007-10-26 07:14:43
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