At first, VoLTE will be used to deliver "Rich Communications Services" (which look like something similar to what Voice over IP/Video over IP outfits offer today) rather than completely replacing narrowband voice. It will be awhile before Verizon is willing to commit to that, due in part to LTE outages in late 2011.
On the flip side is MetroPC, which has pushed VoLTE as hard as it could.
Then there's Sprint, which will stick to voice over 1x for the foreseeable future, but routes Direct Connect over IP. Sprint's latest DC incarnation seems quite similar to one facet of RCS over LTE.
There is still at least one up near Peoria (https://goo.gl/maps/okjmqNo83tFa9GNg8) that still has some equipment up. Pretty wild. I looked up info on the setups a few years back... there is a lot of reading folks can do online to read about the history.
Wow that long lines site still has all the original equipment still installed and in good condition. Almost every long lines site in Oregon has at least had the horns removed if not all the equipment removed.
The FCC certifications are designed to deal with RF exposure/output and determine if the device is safe to use. While a lower EIRP from the phone could indicate reduced RF performance, that's not necessarily the case.
I need to figure out if other phones have a feature like LG's "Knock On" and contemplate those as I look at new devices.