On Jul 29, 2011, at 2:31 PM, Jim Warthman wrote: > Perhaps this discussion of standards would be simpler if we separate voice > and data.
Why? voice is not GSM and data is not W/CDMA. On a 3G link, both go over W/CDMA. W/CDMA uses a GSM compatible command/control layer but the actual broadcast layer is totally different. > > Enjoy, > > Jim > > > On Jul 29, 2011, at 12:44 PM, objectwerks inc wrote: > >> >> On Jul 29, 2011, at 1:31 PM, Scott G. Lewis wrote: >> >>> >>> On Jul 29, 2011, at 1:07 PM, Scott G. Lewis wrote: >>>> >>>>> Unless your boss needs to be on Verizon, then he would use the GSM iPhone, >>>> >>>> You mean WCDMA iPhone. The original iPhone was the last GSM iPhone. Sure, >>>> the current iPhones support GSM when they have to fall back to it. >>> >>> I suspect the phrasing bit me on that. I meant unless he needed to be on >>> Verizon.... he would use a GSM iPhone. >> >> The last GSM iPhone was the original iPhone. The 3G and on iPhones use >> W/CDMA (which is different than the CDMA variant used by Verizon, Sprint, et >> al). AKA "UMTS" >> >> W/CDMA uses a CDMA type signaling with a GSM type control/command layer. >> Since it uses the same sort of control/command layer as GSM it is an easier >> upgrade to GSM for 3G service than other 3G type services. But note that >> not all W/CDMA/UMTS carriers support GSM nor are all W/CDMA/UMTS carriers >> upgraded to it from GSM. Both NTT DoCoMo and SoftBank in Japan, and the >> Korean users, for example, did not have GSM networks in existence when they >> introduced their W/CDMA/UMTS networks. >> >> http://en.wikipedia.org/wiki/W-CDMA_(UMTS) >> >>> But that said, the non-CDMA iPhone is GSM... no? >> >> See above. >> >> The iPhone 3G/3GS/4 are commonly called GSM phones. They do support GSM as >> a fall back but normally run on W/CDMA/UMTS unless it is not available. >> They are dual mode phones. GSM does not allow concurrent voice and data. >> W/CDMA does, which is why the iPhone supports it. >> >>> Have I lost my mind, and has Wikipedia failed me to boot? >>> >>> In any event, as you mentioned, other than the CDMA iPhone for Verizon, it >>> works all over. >> >> Exactly. Which is why Apple sells it all over as well, including non GSM >> places like Korea and Japan. >> >>> What the roaming charges are... that's another story. :) >> >> true. We are going to Japan in a month and a half and which is why I am >> going to try this: >> >> http://applenberry.com/store/gevey-sim/gevey-ultra.html >> >> with a local SIM card my SIL is going to get for me there. That along with >> >> http://www.unlockit.co.nz/unlockit/ >> >> Will hopefully help me out on that front. I will be sticking my normal ATT >> sim in a NOKIA for the trip so that people in an emergency can call me >> directly. >> >> >> >> _______________________________________________ >> iPhone-talk mailing list >> [email protected] >> http://www.omnigroup.com/mailman/listinfo/iphone-talk > > > _______________________________________________ > iPhone-talk mailing list > [email protected] > http://www.omnigroup.com/mailman/listinfo/iphone-talk _______________________________________________ iPhone-talk mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/iphone-talk
