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AT&T and Verizon Announce Voice Over LTE Interoperability for 2015

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Original poster
Apr 12, 2001
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AT&T and Verizon today announced voice over LTE (VoLTE) interoperability plans that will allow Verizon Wireless and AT&T customers to make VoLTE to VoLTE calls between networks.

VoLTE is a feature that is designed to enable high-definition voice calls that significantly improve call quality.
Engineers from both companies are working through a full set of requirements, beginning with extensive testing in lab environments and then moving to field trials. This approach ensures customers will have a seamless experience making VoLTE HD Voice calls between networks and lays the foundation for interoperability of other Rich Communications Services (RCS) such as video calls, rich messaging, and more in the future.
Verizon introduced its Advanced Calling 1.0 services with VoLTE support back in September, shortly before the release of the iPhone 6. With VoLTE, Verizon customers are able to use simultaneous voice and data capabilities over a 4G LTE network for the first time.

VoLTE in action on Verizon​

AT&T is still in the process of rolling out VoLTE support to all markets, continuing to test the feature in a limited number of cities in Illinois, Wisconsin, Indiana, Minnesota, Georgia, and Texas.

VoLTE requires both built-in phone support, included in the iPhone 6 and the iPhone 6 Plus, and carrier participation. VoLTE interoperability between AT&T and Verizon is good news, as it is not currently possible to make VoLTE calls to outside carrier networks.

Both Verizon and AT&T state hope to establish similar deals with other carriers in the future as VoLTE continues to pick up traction.

Article Link: AT&T and Verizon Announce Voice Over LTE Interoperability for 2015
 

sziehr

macrumors 6502a
Jun 11, 2009
669
487
awwww our two conglomerates are working together to avoid carriage charges for POTS. Great job guys at avoiding taxes while also giving people what they want. I doubt we see a dime in the savings they are about to have
 
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xero9

macrumors 6502a
Nov 7, 2006
859
481
I assume even without an agreement a call could be made using VoLTE on both AT&T and Verizon and it would work, it just might not benefit from higher quality audio.
 
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B2k1977

macrumors regular
Mar 15, 2009
184
87
No Thanks

so now my voice calls will count against my data plan? No thanks, I will turn it off if at all possible.
 
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DeanLubaki

Contributor
May 29, 2014
1,084
998
Toronto
Are you serious?

FaceTime Audio works just fine without the networks.

FaceTime Audio = iDevice to iDevice
Phone Call = Phone to any other phone regardless of the brand or carrier.

Stop living in you fantasy world where everyone uses FaceTime Audio because almost nobody does.
 
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farewelwilliams

macrumors 601
Jun 18, 2014
4,303
16,512
Stop living in you fantasy world where everyone uses FaceTime Audio because almost nobody does.

before iOS 8 + yosemite, i usually do facetime audio so that it was easier for people to answer my calls (calls go to all of their iOS devices)
 
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Black Magic

macrumors 68020
Sep 30, 2012
2,303
980
FaceTime Audio = iDevice to iDevice
Phone Call = Phone to any other phone regardless of the brand or carrier.

Stop living in you fantasy world where everyone uses FaceTime Audio because almost nobody does.

I have used FaceTime Audio a few times recently and the sound quality is superb. Crystal Clear. If you can use it, you should. It's my preferred method when available.
 
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xero9

macrumors 6502a
Nov 7, 2006
859
481
I've used FaceTime audio only a handful of times, but it was handy. I use it if I'm out of the country and need to phone back home. Was even out and about on T-Mobile's LTE network and worked exactly like a regular call, except it was eating up my 200MB a day. Worked very well though.
 
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newagemac

macrumors 68020
Mar 31, 2010
2,091
23
FaceTime Audio = iDevice to iDevice
Phone Call = Phone to any other phone regardless of the brand or carrier.

Stop living in you fantasy world where everyone uses FaceTime Audio because almost nobody does.

Close to 50% of phones in the U.S. are iPhones. In my network of people, it is far higher. I think your "almost nobody" comment is the one in fantasy world.
 
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avanpelt

macrumors 68030
Jun 2, 2010
2,937
3,838
As a Verizon customer, I couldn't care less about interoperability of VoLTE between cell carriers. All I care about is that when I make a phone call from my iPhone 6 (regardless of the number I am calling), as long as I am in an LTE area, the call is made over Verizon's LTE network thus allowing me to talk and surf simultaneously over the LTE network.
 
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nutmac

macrumors 601
Mar 30, 2004
4,953
3,843
In my experience with T-Mobile, VoLTE is not ready for prime time. If you initiate or receive a call while connected to LTE, all is fine and dandy. But if you move outside the LTE coverage and into non-LTE tower, which would be fairly common if you are in a vehicle, the call may abruptly drop.
 
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AutoUnion39

macrumors 601
Jun 21, 2010
4,890
941
In my experience with T-Mobile, VoLTE is not ready for prime time. If you initiate or receive a call while connected to LTE, all is fine and dandy. But if you move outside the LTE coverage and into non-LTE tower, which would be fairly common if you are in a vehicle, the call may abruptly drop.


Not everyone's network implementation will be as half-assed as TMobiles. Don't worry.
 
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ArtOfWarfare

macrumors G3
Nov 26, 2007
9,058
4,994
This smells of collusion. AT&T and Verizon are working together, and intentionally not with T-Mobile, to try and remove T-Mobile from the picture so that AT&T and Verizon can go back to a duopoly where neither of them have to try, because they can both agree to just have the same quality and prices and have roughly half of the US market.
 
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Lorenzo F

macrumors member
Sep 13, 2014
69
15
Oakland, CA
I have used FaceTime Audio a few times recently and the sound quality is superb. Crystal Clear. If you can use it, you should. It's my preferred method when available.

I completely agree with Black Magic. I have AT&T and regular voice calls are so inferior compared to FaceTime Audio. I prefer to use Facetime Audio, but the problem is that not all the people I contact have enough data to use it.

If the sound quality of VoLTE is anything like FaceTime Audio, we'll finally be getting what we deserve.
 
Comment

nutmac

macrumors 601
Mar 30, 2004
4,953
3,843
Not everyone's network implementation will be as half-assed as TMobiles. Don't worry.

So are you telling me that iPhone 6/6 Plus on your faultless Verizon Wireless, the same carrier that puts a tracking tag on every web requests, lets you connected to LTE everywhere you go? If so, good for you.

But here in northern California, my wife's work phone is on Verizon's 4G (not LTE) at least third of the time so enabling VoLTE would mean frequent dropped calls.
 
Comment

itr81

macrumors regular
Jul 12, 2010
230
52
This smells of collusion. AT&T and Verizon are working together, and intentionally not with T-Mobile, to try and remove T-Mobile from the picture so that AT&T and Verizon can go back to a duopoly where neither of them have to try, because they can both agree to just have the same quality and prices and have roughly half of the US market.


Hmmm you left out sprint. I believe both verizon and AT&T are trying to work with other carriers since the svc would almost be worthless otherwise. The big question is what's the status on tmobile and sprint volte roll out.
 
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Terrin

macrumors 6502
Apr 5, 2011
430
1
I assume even without an agreement a call could be made using VoLTE on both AT&T and Verizon and it would work, it just might not benefit from higher quality audio.

That is true. It works on T-Mobile currently between T-Mobile subscribers.

The call quality is significantly better when I am talking with somebody who is also on T-Mobile.
 
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