So what is the difference between GSM and CDMA?
To further confuse the issue, a lot of people say "GSM" when they actually mean "UMTS" or "WCDMA". I'm not sure exactly how UMTS and WCDMA fit together (I think they complement each other).
GSM is a 2G system that provides low data speeds and does not support simultaneous voice and data. WCDMA (3G) is often deployed alongside GSM and provides significantly faster speeds, plus simultaneous voice and data. In many areas GSM is still used as a fallback, but this is not a requirement of the technology (for example, Telecom here in NZ uses WCDMA exclusively).
CDMA, more accurately called CDMA2000, sits somewhere between GSM and WCDMA in terms of technology. It provides faster data speeds than GSM and better call quality, but it's gradually being replaced with WCDMA or LTE throughout the world (for example it's no longer used in NZ or Australia, and I know that Canada started a transition but I don't know whether it's completed).
Confused yet?
No, not at all. Surprisingly you made my brain 'ping'. We still have GSM in the UK but only for ancient/ultra basic phones. Seriously though, your post made sense
One question, what do you mean by voice and data?
On a WCDMA network you can use the Internet while you're on a call. On GSM, you have to end your call before you can access data.
I don't see why you think that's the case.
Millions of people will be using GSM every day with smartphones in the UK (iPhone included).
It really boils down to this: a consumer should select whatever network provides the coverage the consumer needs in the places that the consumer needs it most. They way the networks work isn't going to be relevant to most people. It's whether a given carrier will work or not for the individual that will matter.Like you have all this about EDGE (we have this but on phones that are pre 3G) but what is the whole GSM, CDMA thing? The way your networks work just confuses me and when reading threads I just get lost.
Like you have all this about EDGE (we have this but on phones that are pre 3G) but what is the whole GSM, CDMA thing? The way your networks work just confuses me and when reading threads I just get lost >.< Thank you.
Actually GSM is the older one compared to CDMA. Overall CMDA is generally somewhat better as far as voice compared to GSM equivalent.Okay, so here's how it works:
LTE: Used by all networks in the US, has fast speeds. Only some phones support voice on this, otherwize it goes back to 3g or 4g (By AT&T/T-Mobile's definition)
GSM Networks: AT&T, T-Mobile. Used mostly everywhere
GSM Technologies: GPRS, EDGE, UMTS, HSPA, HSPA+
GPRS = 2G (The slowest of all)
EDGE = 2G (or 2.5g, depending on who you ask)
UMTS = 3G (Basic 3G technology, quite slow)
HSPA = 3G (Revised 3G, fast enough. Most countries use this technology for 3G)
HSPA+ = 3.5G/4G (Revised HSPA, way faster, almost LTE speeds, depending on the standard. It is advertised as 4G by AT&T and T-Mobile)
CDMA Networks: Verizon, Sprint, Cricket, ETC. Useless standard IMO, doesn't use SIM cards (It does if the network uses LTE, which is based on GSM). Was used everywhere before GSM came in
CDMA Technologies: CDMA, CDMA2000, EVDO
CDMA: 2G
CDMA2000: 3G (SLOW!!)
EVDO: 3G (A little bit faster, but still slow. Max speed possible is 2mbps)