The Verizon iPhone 4 contains a radio chip capable of connecting to both CDMA and to GSM networks, a detailed autopsy of the device has revealed. The take-apart was conducted by iFixit.com and exposed the presence of Qualcomm's MDM6600 chip, a part that supports both types of cellular technology when connected to appropriate …
A while ago there was a video of an alleged iPhone 5 floating around the net. It looked identical to the Verizon iPhone, including the antenna gaps in the same places, just with a SIM slot. Might be safe to assume now that this will be the next iPhone.
Certainly good news for iPhone 4 owners, because even with new chippery inside (dual-core CPU?) and CDMA/GSM capabilities the phone will be (and look) very much the same and such the iPhone 4 won't look "old". Apple did the same with the iPhone 3G and 3GS. Helps a lot not to devaluate quite new but essentially obsolete hardware.
Quote: there's technically nothing to stop Apple incorporating a second, GSM-tuned antenna too,
Not in this form factor. The entire space usable for antennae is occupied now, rest is glass. If they go back to a plastic/metal back - maybe. Then they can etch it as a part of the back cover.
That however will be perceived as step backward in "shiny-ness" so I do not quite see that happening.
What's to stop them using 1 aerial and incorporating a trap? That would allow them to just use the same design as the iphone 4 (perhaps with a lacquer coating?)
(For the non-RF minded, a trap in an aerial is a tuned circuit, allowing an aerial to appear a different length at different frequencies.)
"nothing to stop Apple incorporating a second, GSM-tuned antenna"
No need to, GSM can piggy back on the CDMA antenna and the degraded signal will be little worse than a Lemon 4, which everyone will remember, didn't stop iPhans from buying it.
Maybe they could deposit an antenna on the glass.
CDMA you mean CDMA2000!!
Sorry to be a pedantic sod! but UK uses W-CDMA and US CDMA2000. CDMA just means the modulation type.
Which UK network uses CDMA? I'd love to know
its called W-CDMA
All the networks that have 3G in the UK, its called W-CDMA.
CDMA vs CDMA2000 vs GSM vs W-CDMA
To clarify - CDMA is an encoding technology. In the 2G days, GSM used TDMA and Qualcomm's CDMA kit used CDMA. Therein starts the problem - CDMA is a brand name AND a technology.
Enter 3G - 3GSM (or UMTS) used W-CDMA as its encoding (the W is "wideband"). The 3G version of the Qualcomm 2G CDMA is called CDMA2000 and also uses a CDMA encoding.
On the subject of antennas - it's not about the technology, surely. You don't tune an antenna to CDMA or GSM (brand, not encoding). You tune it to a frequency. If you have an 850MHz CDMA network and an 850MHz GSM network, the same antenna should work fine for both. The difference is that _most_ 3GSM networks are on 2100MHz.
One antenna to rule them all and in the darkness....
"Which UK network uses CDMA? I'd love to know"
All of them. W-CDMA is the basis of UMTS, aka GSM 3G.
As AC said, CDMA2000 is the weird Verizon thing.