Well, Verizon has had LTE for a long time now. LTE is an extension of GSM.
Remember that back in 2012 / earlier that was LTE0 where you had data only and
the voice was still on CDMA / 1x. Remember back when you couldn’t talk and
browse at the same time for example.
I got to VZ around 2013 and we worked on Voice over LTE as well as moving from
the 700 MHZ band to much higher frequencies in the AWS band for faster speeds.
That switching was called XLTE. So by the time I left VZ they had completed
VOLTE and had a fully baked 4G solution separate from CDMA.
Now, LTE advanced was released, we just started playing with that in the lab
before I left. That’s where you bond channels together for more speed. This
is now fully baked and available in 461 cities around the country. Three and 4
way MIMO are next and will be rolled out over the next year.
T-Mobile also has a very advanced network, AT&T is catching up (like they
always do) and Sprint well not so much.
On Sep 9, 2016, at 12:50 PM, Sarah Alawami
<marrie12@xxxxxxxxx<mailto:marrie12@xxxxxxxxx>> wrote:
Wo! When did VZ switch to a HSM network? This is actually news to me as my
friend who is a VZ subscriber thought that they were CDMA as well. Interesting
stuff. I really love this aspect of computers as it's changing all the time.
Who knows where it will go. Now let's hope sprint can just go die.
On Sep 9, 2016, at 6:41 AM, Scott Granados
<scott@xxxxxxxxxxxxxxxx<mailto:scott@xxxxxxxxxxxxxxxx>> wrote:
Sarah, your dead wrong.
Remember, I built some of these networks.;)
The 6 and the 6s / 6s and 6s+ have a qualcomm radio that speaks everything,
CDMA, EVDO, LTE, HSPA/ HUPSA, /+, GPRS / Edge, 1X and so forth.
The new Intel chips speak GSM protocols only so no WCDMA, CDMA, EVDO or 1X.
You’re also dead wrong, Verizon is now a GSM network. There is some old CDMA
still activated for legacy customers but 40% of the traffic has been entirely
migrated over to LTE including voice and LTE is a long term evolution of the
GSM protocol. Verizon now fully uses SIM modules and such.
Sprint has a full LTE network available in some places but still very dependent
on CDMA / EVDO so you would need a qualcomm based radio to connect because
qualcomm owns the rights to CDMA. Intel will be providing CDMA capability in
2018 as they bought a chip provider with CDMA rights but by 2018 there will be
no need in the US. (with the exception of Sprint who is a failing company with
a failed network roll out) By 2018 we’ll be talking about 5G anyway and
hopefully someone will have bought Sprint by them and put them out of their
misery or rather bought them from soft bank as soft bank is just continuing the
bad practices from before. That spectrum could be better used by 1 of the
other 3 or maybe a European carrier could move in to the US market. (aside
from the one that started T-Mobile)
On Sep 9, 2016, at 12:15 AM, Sarah Alawami
<marrie12@xxxxxxxxx<mailto:marrie12@xxxxxxxxx>> wrote:
Actually tmobile and at&t are gsm. Tmobile actually told me I believe that my 6
will only work on GSM networks and for me even wiht sprint that was the case.
They locked the phone to sprint and you were not getting it unlocked to work on
VZ. VZ was the only carrier to make their phones world compliant. I had a
friend who tried and got this to work. Their phones were true world phones.
By the way VZ and sprint are both in the CDMA spectrum. So, yeah for me this
is not big shock. I kind of had the feeling this would happen since about 2012
or so.
On Sep 8, 2016, at 8:53 PM, Mary Otten
<motten53@xxxxxxxxx<mailto:motten53@xxxxxxxxx>> wrote:
If you read the article, you will know that it has not always been this way.
The 6S and the 6S plus, no matter which carrier you purchase them from, would
work on CDMA or GSM. Since most of the rest of the world is on GSM, it may not
be a big deal. But if you buy one of the T-Mobile or AT&T phones and, a year
from now, you decide you would like to move to Verizon, you will be out of
luck. That is not true if you have a 6S or 6S plus.
Mary
Sent from my iPhone
On Sep 8, 2016, at 8:43 PM, Sarah Alawami
<marrie12@xxxxxxxxx<mailto:marrie12@xxxxxxxxx>> wrote:
I believe it always has ben this way. So for me this is not shockign news at
all.
Blessings and happy Thursday
On Sep 8, 2016, at 6:30 PM, Mary Otten
<motten53@xxxxxxxxx<mailto:motten53@xxxxxxxxx>> wrote:
iPhone 7 Models From AT&T and T-Mobile Do Not Support CDMA Networks
MacRumors: Mac News and Rumors / Joe Rossignol
Choosing which iPhone model to purchase this year should be more carefully
considered, as both AT&T and T-Mobile models of the iPhone
7<http://www.macrumors.com/roundup/iphone-7/> and iPhone 7 Plus do not support
CDMA networks such as Verizon and Sprint in the United States. Apple confirmed
the matter in fine print in the iPhone 7 tech
specs<http://www.apple.com/iphone-7/specs/> and on its
LTE<http://www.apple.com/iphone/LTE/> page.
[iphone-7-carriers]
A customer that purchases an iPhone 7 from Apple's website and selects AT&T as
their carrier, for example, would be unable to later use the smartphone on
Verizon, Sprint, or any other CDMA network, even if the device is unlocked. By
comparison, all iPhone 6s<http://www.macrumors.com/roundup/iphone-6s/> and
iPhone 6s Plus models worked on both GSM and CDMA networks.
A customer that purchases an iPhone 7 from Apple's website and selects Verizon
as their carrier, on the other hand, would also be able to use the smartphone
on AT&T, T-Mobile, Sprint, or any other GSM or CDMA network.
It was previously reported that Apple would switch to Intel
modems<http://www.macrumors.com/2015/10/16/intel-lte-modem-chip-iphone-7/> for
select iPhone 7 and iPhone 7 Plus models, including AT&T
models<http://www.macrumors.com/2016/06/10/intel-qualcomm-modem-split-iphone-7/>,
and Intel modems do not support the CDMA standard in the United States. That
is likely the reason why AT&T and T-Mobile models are limited to GSM networks.
[iphone-7-wireless]
Only Verizon and Sprint models support both GSM and CDMA networks
The same report said Qualcomm would supply modems for the remaining iPhone 7
and iPhone 7 Plus units, including Verizon and Chinese
models<http://www.macrumors.com/2016/06/10/intel-qualcomm-modem-split-iphone-7/>,
and this appears to be the case. Qualcomm modems support both the GSM and CDMA
standard, which explains why the iPhone 7 from Verizon and Sprint will work on
all carriers.
Qualcomm, which holds patents for WCDMA and CDMA2000 standards, is the main
CDMA modem supplier in the United States. The company developed the first
CDMA-based cellular base station in 1990, and since then it has licensed its
technology to companies like Apple in return for royalty payments.
Until this year, Qualcomm was Apple's exclusive supplier of modems for LTE and
Wi-Fi connectivity, which explains why the iPhone 6s and previous generations
supported both GSM and CDMA networks regardless of carrier. But with Intel
entering the mix, choosing which iPhone to purchase is now more meaningful.
[iphone-6s-wireless]
All iPhone 6s and iPhone 6s Plus models supported both GSM and CDMA networks
The lack of CDMA support in iPhones with Intel modems may be short lived,
fortunately, as Intel acquired CDMA
assets<http://www.fiercewireless.com/wireless/intel-continues-to-pare-mobile-losses-buys-cdma-modem-assets-from-via-telecom>
from VIA Telecom in 2015. It is believed that this acquisition could pave the
way for Intel to release its first LTE modem with both GSM and CDMA support as
early as 2017 or 2018.
Ultimately, the most obvious choice should be to purchase a Verizon or Sprint
model, even if you are an AT&T or T-Mobile customer, especially when
considering resale value. However, some customers may have difficulty
purchasing from another carrier, depending on their current status with their
existing carrier.
Apple should also release an unlocked SIM-free model in the U.S., likely based
on the Verizon/Sprint model, in a few weeks based on past launches.
Related Roundup: iPhone 7<http://www.macrumors.com/roundup/iphone-7/>
Tags: Intel<http://www.macrumors.com/roundup/intel/>,
Sprint<http://www.macrumors.com/roundup/sprint/>,
T-Mobile<http://www.macrumors.com/roundup/t-mobile/>,
AT&T<http://www.macrumors.com/roundup/att/>,
Verizon<http://www.macrumors.com/roundup/verizon/>,
Qualcomm<http://www.macrumors.com/roundup/qualcomm/>
Discuss this
article<http://forums.macrumors.com/threads/att-and-tmobile-iphone-7-models-lack-cdma.1992985/>
in our forums
[http://feeds.feedburner.com/~ff/MacRumors-Front?d=yIl2AUoC8zA]<http://feeds.macrumors.com/~ff/MacRumors-Front?a=ojdG2Ez3hfc:mkr4un4YuMw:yIl2AUoC8zA>
[http://feeds.feedburner.com/~ff/MacRumors-Front?d=6W8y8wAjSf4] ;
<http://feeds.macrumors.com/~ff/MacRumors-Front?a=ojdG2Ez3hfc:mkr4un4YuMw:6W8y8wAjSf4>
[http://feeds.feedburner.com/~ff/MacRumors-Front?d=qj6IDK7rITs] ;
<http://feeds.macrumors.com/~ff/MacRumors-Front?a=ojdG2Ez3hfc:mkr4un4YuMw:qj6IDK7rITs>
Original Article:
http://www.macrumors.com/2016/09/08/att-and-tmobile-iphone-7-models-lack-cdma/
Sent from my iPhone
