CDMA and GSM. What are the differences? - BMW Luxury Touring Community
 
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post #1 of 4 Old Jan 24th, 2006, 2:16 pm Thread Starter
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CDMA and GSM. What are the differences?

I was just reading the thread about SIM cards on GSM phones an CDMA nothing having it.
I don't want start a flame trhead about which one is better, but I would like to know better the real difference in between.

I try GSM once (Cingular) and had not a really god experience once I went to remote places where I had good signal with CDMA (Verizon). So I went back to Verizon.

Now, reading that explanation by Ed Bruce ( http://www.bmwlt.com/forums/showthread.php?t=4725 )
looks like GSM are a better choice (more flexibility) then CDMA.
The best one looks like is the hability to change your phone accordly with the country you are visiting, not paying the high Verizon Overseas Charge.
Is possible to do it with CMDA?
Thank you

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post #2 of 4 Old Jan 24th, 2006, 5:19 pm
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Basically they're 2 different radio technologies for cellular phones. As for coverage, it's less about GSM vs. CDMA than it is the deployed network the cell provider has. I carried a Cingular GSM and Verizon CDMA phone for the last 10 months and around the valley I found pretty much equal coverage/strength. But when I traveled it was a mixed bag. For example, I had better luck with my Verizon phone at CCR, but the Cingular was better in Eastern Arkansas. I think it really depends on where the provider has the most market penetration that determines how much they invest in the network deployment. On a nationide scale, Verizon probably has the biggest/most dense compared to the rest, regardless of phone radio technology.

The downside of CDMA phones is that there is no way to adapt them to other networks without paying fees (like with Verizon). GSM phones allow you to change out the SIM card to match the network you are on. Of course, many GSM providers lock their phones so they can't be easily used on other providers' networks.

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post #3 of 4 Old Jan 24th, 2006, 5:35 pm
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Here's a link that will give you a little insight


Here

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post #4 of 4 Old Jan 27th, 2006, 4:38 pm
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One of the nice advantages of a SIMM card is that you can store all your telephone numbers on the card. When you purchase a new phone you simply use the card from your old phone, no need to reprogram in all those telephone numbers again!

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