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.
I am getting an MB3. AllI wanted is for my phone to be able to roam on T-Mobile so I called customer support. My phone still does not roam on T-mobile but I got an MB3 out of it. I will let you know if it improves my LTE experience.
I have no issues with texting over wifi, the only way texting will not work over wifi is if you are getting group messages or include any multimedia items such as videos, pics or audios. Group messaging is considered MMS so it will only send/receive once service is restored. Any input is welcome.
Loving this feature since my building is really old and service does not penetrate inside the building, its not just Sprint but the same applies to the carriers. Recently installed my old Magic Box 2 at my office and at least one side of the building has LTE and great speeds. No more 3G or no service inside the building.