iPhone 5s/5c LTE Band Tweaks Combine AT&T and Verizon in One Model, Add China Mobile

thats kind of cool. making it easier to swap carriers.

Can anyone confirm that the new VZW version of the iPhone will support simultaneous LTE data and CDMA calling? As has been made clear previously, the iPhone is the only Verizon smartphone that can't do this, due to Apple's design - they didn't want two radios at the same time. Perhaps this new band tweaking will fix that.

I just went and looked up the SAR reports at the FCC. Not only did they not list CDMA and LTE (SVLTE) as a test combination, they actually wrote a letter about it (E2642A is the CDMA version):

As I understand it, the only way to have a CDMA(Verizon) voice call and and an LTE data session at the same time is to power up two radios simultaneously, which some other phones, like the razr maxx, do. This impacts battery life and requires other engineering compromises, which Apple has so far been unwilling to make.

They probably don't have room for another antenna, especially on the aluminum backed iPhone 5. Right now, the only all metal phone using its own case back as antennas is the HTC One.

This problem does not exist with AT&T on an iPhone because TDMA/GSM can have a phone and data channel open at the same time on the same radio/session.

Unlike Verizon, AT&T cannot do voice and LTE at the same time.

Currently, GSM phones drop back to UMTS-3G when you want to use voice and data simultaneously.

The real Question:


Can we talk and surf with Verizon or not?

I was not planning to upgrade, but if someone can confirm then I will upgrade to 5S from 5.

No - as long as Verizon continues to use CDMA for calls this will be a limit.

Well, not necessarily. If Apple changed the antenna design, it is possible that it could use LTE for data and CDMA for voice - this was an antenna limitation of the iPhone 5, IIRC.

Other Verizon phones don't have a problem doing just that...

So will VZ be able to run data/voice simultaneous? Being the same model number as AT&T

No - as long as Verizon continues to use CDMA for calls this will be a limit.

Hope this helps... The MOST current information on the iphone 5s

The VERIZON IPHONE 5S... Has all the necessary bands to work on 3G and 4G LTE ALL Carriers listed EXCEPT SPRINT

The AT&T and TMOBILE IPHONE 5s will work fully on ALL Carriers except Verizon (only 4G LTE Will work, no Voice) and Not at all with SPRINT

the SPRINT IPHONE 5S is compatible with itself and all Canadian Carriers but with MANY Restrictions...

Sprints new network is Partially compatible with other carriers but REFUSES To open its network

Where did you find this info?

Go to the FCC Authorization Search page at:

https://apps.fcc.gov/oetcf/eas/reports/GenericSearch.cfm

Enter the Grantee Code : BCG (that's Apple), and a search date range:

It still has to be unlocked, but yes. That's not always as trivial as it seems.

If you buy the Verizon "version" it will be unlocked, period. It has to based on FCC requirements to operate on their LTE network. So, go to a VZW store and get one and pay full price. Unlocked....bingo!

the list that apple is providing is very confusing and leaves so many questions unanswered!
best example: look at the 3rd (Europe) and 4th (Asia/Pacific) iPhone 5s options:

A1457 has bands 1, 2, 3, 5, 7, 8, 20
A1530 has bands 1, 2, 3, 5, 7, 8, 20, 38, 39, 40

why don't they just sell A1530 in both regions?

There must be some other difference between the models. Maybe manufacturing the antenna design with more bands is more complicated and expensive (though I really doubt that), or maybe they want to limit specific Phones to specific geographical regions either to stop skalpers from buying iPhones for regions where they are more expensive or to simply make you buy a new phone when you move to a new country if it's in a different geographical region (to generate sales?)

I guess we will have to wait for users to actually try out putting a sim into the "wrong" iPhone model and test the LTE speeds

As has been said, this is not a limit of verizon, but is rather a limit of the iPhone. My razr maxx has no problem talking and surfing at the same time on 4g.

Well, it depends who you want to blame. It most certainly is a limit of Verizon(CMDA), but other phones have done things to work around the limitation and Apple -to date- has not.

As I understand it, the only way to have a CDMA(Verizon) voice call and and an LTE data session at the same time is to power up two radios simultaneously, which some other phones, like the razr maxx, do. This impacts battery life and requires other engineering compromises, which Apple has so far been unwilling to make.
So, is it the fault of Verizon's CDMA network? Yes absolutely it is. If Verizon were to change to GSM, or were to enable voice over LTE, then the iPhone 5 and earlier iPhones could do both at the same time.
This problem does not exist with AT&T on an iPhone because TDMA/GSM can have a phone and data channel open at the same time on the same radio/session.
CDMA also creates other wonkiness with how call waiting/conference calls work as well, issues which do not occur with TDMA/GSM.

Is it also Apple's fault? Well yes, sort of, other phones can do it. Apple could design around the limitation by powering two radios at once, one for CDMA voice and one for data. In the past, they have said that it required engineering & design compromises that that are unwilling to make.

My guess is that at this point Apple is no more likely to engineer a kludge for this CDMA limitation than they are to support Adobe Flash.

I would love to be wrong on this, maybe Apple has given in, or maybe Verizon is getting it's act together on Voice over LTE.
Anyone know for sure?