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AT&T Carrier Update 18.1
- Thread starter WJKramer
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Ok source? Heres mine. Currently a call has to be on the same network amongst other requirements. ATT and Verizon working on interoperability between themselves for 2015.
http://www.verizonwireless.com/news...rd-voice-over-lte-volte-interoperability.html
http://www.verizonwireless.com/support/advanced-calling-faqs/
<<"You can make an HD Voice call the same way you make a regular voice call (e.g., from your Contacts app, Phone app or Recent Calls), provided that both you and the person you're calling:
Are using an HD Voice-capable phone
Have the HD Voice feature enabled
Are connected to the Verizon 4G LTE network
On most devices, you ll know you're on an HD Voice call if an "HD" logo appears in the upper right corner of your in-call screen. If a wired headset or a Bluetooth headset is connected to your phone, HD Voice calls may not be delivered to the headset with HD quality unless the headset is also compatible with HD Voice.">>
http://www.androidcentral.com/volte-how-use-it-and-why-you-should
http://www.pcmag.com/article2/0,2817,2464149,00.asp
<<"With all of these different kinds of VoLTE, interoperability is an issue. Right now in the U.S., you can only make HD calls between HD phones on the same carrier. Verizon is "in lab work" to enable HD calling with "other carriers" but "not Sprint" ">>
OK so you are technically correct, VoLTE is in fact using the LTE network as the carrier for voice by definition, however today's implementation of it (Verizon Advance Calling 1.0 and whatever ATT calls theirs) does have the limitations such as being on the same network, having certain enabled devices etc from all I have seen on the subject. If you have other info available showing VoLTE can be used for all calls as long as the originating device is on LTE even to other carriers or landlines I am interested in seeing it.
It does work that way though, and all you need to do to confirm it is call any non-LTE mobile, non-AT&T mobile, or non-mobile phone number and verify that your phone doesn't drop from LTE, provided you're in a VoLTE capable area. My wife has a 5s and my 6+ doesn't drop from LTE when I call her. The 5s doesn't support VoLTE. Case closed.
VoLTE != HD voice. VoLTE is a method of using LTE as a voice carrier, much like UMTS/HSPA and GSM had their own methods for acting as voice carriers. HD Voice is simply a speech codec (AMR wideband). HD Voice can technically be used on 3G/4G UMTS/HSPA but for whatever reason no US carriers are implementing it. If you remember, the iPhone 5 was announced to support HD Voice, but no US carriers ever implemented it on HSPA, therefore the last we really heard about that (as far as the US is concerned) was the launch keynote for the 5.
No... actually it doesn't disagree with me. HD Voice and VoLTE are not the same thing. HD Voice is the trade name for the AMR-WB codec that transforms your analog voice into a digital signal. AMR-WB is in use on GSM, UMTS and LTE - notably on T-Mobile here in the US. VoLTE is not part of the equation, outside of the fact it uses this voice codec. To have HD Voice, that is, AMR-WB to AMR-WB - you need to be on the same network. Not on VoLTE.
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No source needed. HD Voice and VoLTE are not the same thing, never have been and never will be - so your sources aren't applicable. HD Voice is the AMR-WB voice codec. Nothing more. Its use pre-dates the first VoLTE deployment by nearly a decade. In the US, it was launched by T-Mobile on UMTS and GSM a year before they ever hinted at VoLTE. Sprint uses it as well, with no VoLTE whatsoever.
Here's a screenshot from the last time we had to have this discussion, courtesy of someone else... calling an 800 number, on VoLTE:
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Well ok. Not sure a screenshot is any proof but thats ok. I asked for real info but apparently a screenshot is all you need, (no source needed) So based on my screenshot, does that mean Verizon now supports wifi calling? I mean since I see the wifi symbol during a call?
That is a ridiculously stupid question that I am sure you already know the answer to.
What more do you need exactly? The two best ways to test this are: get access to the VoLTE specification white paper from 3GPP, or test it yourself (deductive reasoning is useful here!). The iPhone has one radio, therefore it can only be in one mode at a time. If the phone is in a call and still on LTE, then it must be using VoLTE, no? The 800 number in his image is the landline call center for Verizon Wireless. Clearly it works.
Further, from Wiki:
"To ensure compatibility, 3GPP demands at least AMR-NB codec (narrow band), but the recommended speech codec for VoLTE is Adaptive Multi-Rate Wideband, also known as HD Voice. This codec is mandated in 3GPP networks that support 16 kHz sampling." - http://en.wikipedia.org/wiki/VoLTE#Voice_quality
Why exactly would VoLTE support AMR Narrowband (the usual old GSM speech codec) if the only reason VoLTE was used was to facilitate an HD Voice call? Or if even VoLTE and HD Voice were synonymous terms (they are not).
Multiple people have had experiences opposite to your supposition through actual testing. As much as I see various sites on the net conflating HD Voice and VoLTE, I wouldn't put much stock in your "sources."
Maybe we're all just elaborate trolls
What more do you need exactly? The two best ways to test this are: get access to the VoLTE specification white paper from 3GPP, or test it yourself (deductive reasoning is useful here!). The iPhone has one radio, therefore it can only be in one mode at a time. If the phone is in a call and still on LTE, then it must be using VoLTE, no? The 800 number in his image is the landline call center for Verizon Wireless. Clearly it works.
Further, from Wiki:
"To ensure compatibility, 3GPP demands at least AMR-NB codec (narrow band), but the recommended speech codec for VoLTE is Adaptive Multi-Rate Wideband, also known as HD Voice. This codec is mandated in 3GPP networks that support 16 kHz sampling." - http://en.wikipedia.org/wiki/VoLTE#Voice_quality
Why exactly would VoLTE support AMR Narrowband (the usual old GSM speech codec) if the only reason VoLTE was used was to facilitate an HD Voice call? Or if even VoLTE and HD Voice were synonymous terms (they are not).
Multiple people have had experiences opposite to your supposition through actual testing. As much as I see various sites on the net conflating HD Voice and VoLTE, I wouldn't put much stock in your "sources."
Maybe we're all just elaborate trolls
Nothing more thanks! Again I realize the technology is designed to eventually process all calls but was more curious if ATT or Verizon has stated somewhere you were aware of how they were implementing it. All their advertised info pertains to VoLTE HD calling for now. But something like below was more what I was after than a "look at the symbol up top when you make call", "sources".
Circuit-switched fallback (CSFB)
In this approach, LTE just provides data services, and when a voice call is to be initiated or received, it will fall back to the circuit-switched domain. When using this solution, operators just need to upgrade the MSC instead of deploying the IMS, and therefore, can provide services quickly. However, the disadvantage is longer call setup delay.
Simultaneous voice and LTE (SVLTE)
In this approach, the handset works simultaneously in the LTE and circuit switched modes, with the LTE mode providing data services and the circuit switched mode providing the voice service. This is a solution solely based on the handset, which does not have special requirements on the network and does not require the deployment of IMS either. The disadvantage of this solution is that the phone can become expensive with high power consumption.
While the industry has seemingly standardized on VoLTE for the future, the demand for voice calls today has led LTE carriers to introduce CSFB as a stopgap measure.
Nope. It says the words "Wifi" while on a Wifi call. Just like it displays the technology the call is on in other situations, be it LTE, 4G, 3G, G (sm), or 1x.
But no proof is needed regardless of the situation if actual demonstration of it functioning isn't good enough. Especially when I know precisely how it works in the first place and am not confusing the HD Voice codec with the network voice carriage takes place on.
Riddle me this, how would the device know what was on the other end if it doesn't start the call?
Verizon's "Advanced Calling" refers to their specific branding of the full suite of services that carriage of voice on LTE allows. OTT services, RCS services -- video calls, video sharing, file transfer, social presence, geolocation, Exchange support, presentations, so on and so forth.
You can call, literally, anyone on the planet over VoLTE. All you lose is RCS and voice quality.
OK cool thanks. I am no way the expert on VoLTE. My questions come from this scenario (and all the Advance calling hype from VZW and ATT). According to that hype, you can start a call on LTE to another LTE user on the same network and if both users have capable handsets get VoLTE HD. All is well UNLESS you are traveling and happen to get out of the LTE area in which case the call will drop because the network cannot handle the transition from LTE back to 3G/CDMA. That is well documented in Verizon information.
So with that in mind, it seems odd to me that you could start a non HD call still using VoLTE while on the LTE network but in same instance as above you move out of the LTE area but in this case the call does not drop. It either makes the transition to 3G/CDMA fine for whatever reason when HD is not involved OR it was using the 3G/CDMA to begin with for the voice call and only LTE for data as per this mode:
Simultaneous voice and LTE (SVLTE)
In this approach, the handset works simultaneously in the LTE and circuit switched modes, with the LTE mode providing data services and the circuit switched mode providing the voice service.
Anyway not a big deal either way, as long as I can make a phone call I really dont care how Verizon processes it.
Just inquiring mind.OK cool thanks. I am no way the expert on VoLTE. My questions come from this scenario (and all the Advance calling hype from VZW and ATT). According to that hype, you can start a call on LTE to another LTE user on the same network and if both users have capable handsets get VoLTE HD. All is well UNLESS you are traveling and happen to get out of the LTE area in which case the call will drop because the network cannot handle the transition from LTE back to 3G/CDMA. That is well documented in Verizon information.
So with that in mind, it seems odd to me that you could start a non HD call still using VoLTE while on the LTE network but in same instance as above you move out of the LTE area but in this case the call does not drop. It either makes the transition to 3G/CDMA fine for whatever reason when HD is not involved OR it was using the 3G/CDMA to begin with for the voice call and only LTE for data as per this mode:
Simultaneous voice and LTE (SVLTE)
In this approach, the handset works simultaneously in the LTE and circuit switched modes, with the LTE mode providing data services and the circuit switched mode providing the voice service.
Anyway not a big deal either way, as long as I can make a phone call I really dont care how Verizon processes it.
As I recall with Verizon even a basic VoLTE call (not just HD) would drop when moving out of LTE coverage.
OK cool thanks. I am no way the expert on VoLTE. My questions come from this scenario (and all the Advance calling hype from VZW and ATT). According to that hype, you can start a call on LTE to another LTE user on the same network and if both users have capable handsets get VoLTE HD. All is well UNLESS you are traveling and happen to get out of the LTE area in which case the call will drop because the network cannot handle the transition from LTE back to 3G/CDMA. That is well documented in Verizon information.
So with that in mind, it seems odd to me that you could start a non HD call still using VoLTE while on the LTE network but in same instance as above you move out of the LTE area but in this case the call does not drop. It either makes the transition to 3G/CDMA fine for whatever reason when HD is not involved OR it was using the 3G/CDMA to begin with for the voice call and only LTE for data as per this mode:
Simultaneous voice and LTE (SVLTE)
In this approach, the handset works simultaneously in the LTE and circuit switched modes, with the LTE mode providing data services and the circuit switched mode providing the voice service.
Anyway not a big deal either way, as long as I can make a phone call I really dont care how Verizon processes it.
Just to tackle the handoffs...
For AT&T and T-Mobile, the calls will hand off back to UMTS without a hitch with eSRVCC. For T-Mobile, it'll maintain HD Voice since the codec is deployed across the entire network.
Verizon can't hand off back to 1x as they never upgraded to 1x Advanced. Sprint did, but they don't have VoLTae anywhere... So even though that handoff exists in lab settings to 1x Advanced, it's still a pipe dream in the real world.
I suspect this as well. I noticed that my battery life took a plunge (on my 6 Plus). I am currently DFU restoring the phone and this time I will not update the carrier and see how this goes.
So i have been having troubles unlocking my AT&T carrier&Icloud
Okay so i have a IPhone 5c White for AT&T an i have someone elses icloud account on it but can still use mine with it still on it. and then my main problem was first unlocking the carrier wll i was in my (General, About, etc) And a update for carrier or some sort of msg had popped up so i accepted the update. (Well a few hours ago before any of this i had popped a T-Mobile sim card in it then taken it out) Now it says in my About info on my iphone that my carrier is T-Mobile 18.1 wtf does thAT MEAN the phone is open to t-mobile network use now all on its own?!
Okay so i have a IPhone 5c White for AT&T an i have someone elses icloud account on it but can still use mine with it still on it. and then my main problem was first unlocking the carrier wll i was in my (General, About, etc) And a update for carrier or some sort of msg had popped up so i accepted the update. (Well a few hours ago before any of this i had popped a T-Mobile sim card in it then taken it out) Now it says in my About info on my iphone that my carrier is T-Mobile 18.1 wtf does thAT MEAN the phone is open to t-mobile network use now all on its own?!
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