i guess they now realize that CDMA was a big mistake.
CDMA was good when it first started. That's why they have the most subscribers now. But I do think this will make people drop calls more unless they have LTE absolutely everywhere with no holes in the network. If not, people will most likely switch to AT&T.
----------
When I went to add it on Verizon's site, it said it was already enabled. Probably because I selected Voice and Data on my phone first. This tells me logging into Verizon's site isn't needed to add the feature, you only need to enabled it on your iPhone 6.
That's weird. I work for Verizon and you are supposed to actually talk to a representative to add the feature because it's still in testing phases. That was as of last week, though. I'll have to ask my manager to see about it. When we were first launching it we were told they would have to come in so we could make sure those that wanted to try it knew that it was in testing and that there could possibly be problems, especially in areas like where I live and when you leave town it goes in and out of 3G and LTE.
----------
AT&T has had this since the second iPhone. Let me be the first to welcome Verizon to 2008.
AT&T does not have this yet....They do not have VoLTE.
----------
So I called Verizon and they enabled Advanced Calling, but it still won't work. I've tried to enable voice and data under cellular, but the circle just keeps spinning.
I've rebooted several times and try to turn it on again, sometimes it says to call Verizon when I try to hit voice and data and other times the circle will just keep spinning.
Any ideas?
Did they tell you it was an immediate affect or that they future dated the change? I would call back or go into a store to see. I haven't done this for anyone at my store yet, mostly because we have the older generation in our area. They don't even know what LTE is.

----------
Yeah I asked the same thing on an earlier post. I was able to do voice and data at the same time here in Australia when the iPhone 3G was around. Even when the iPhone 5 came out with LTE you could do both things simultaneously here.
VoLTE is something completely different. Depending on the phones with Verizon determined if you could do voice and data at the same time. The iPhones couldn't with Verizon, but other phones could. Just depended on what chips were in the phone. Now the iPhone can do both voice and data including VoLTE. I don't know if that makes sense or not. haha.
----------
Tried to activate and got an error:
" Please contact Customer Service. We need to make an adjustment to your features before you can make feature changes to this line of service."
FWIW I'm on unlimited data
I don't know if it will affect your unlimited data, but there's an actual feature they have to add for VoLTE to work. As far as I know, it shouldn't affect your data plan. I could be wrong, though. I would have to check.
----------
Question for people using VoLTE:
Does this increase the quality of calls to land lines too? For example, if you call your bank and speak to an agent, does it sound crisp and clear the way it does on a land line, without the typical "cel phone" distortion?
No. It will only work if the other phone is VoLTE capable too.
----------
Why is this a new thing? I've been calling and going online at the same time since like 2006
VoLTE is a new thing. It stands for "Voice over LTE". It's HD calling. It just so happens to let iPhones do data and voice at the same time too since it's not using the typical CDMA for voice. Don't know if that makes sense. Anyway, some phones on Verizon could do data and voice before now, just not the iPhone.