blog post today that they can now activate Sprint LTE phones under their Bring Your Own Sprint Device (BYOSD) program.
The following LTE models have been tested and verified working by Ting; Samsung Galaxy SIII, Samsung Galaxy Nexus, Samsung Galaxy Victory and Samsung Galaxy Note II LTE. Other Sprint LTE phones, with the exception of the iPhone 5 will likely work. but for now it's up to the user to figure out any manual programming that might be needed.
One thing that isn't clear from the blog post is whether or not Sprint LTE phones on Ting can actually use the LTE network or if they are stuck with Sprint's rather poky 3G. I contacted Ting and received confirmation that LTE does work on the Sprint LTE phones BYOSD'ed to Ting. To the best of my knowledge, that makes Ting the first Sprint MVNO with working LTE on Sprint phones.