Unfortunately, the problem is lack of communication from Sprint. If you were not on this website researching the information yourself you would be completely uneducated on the matter.
Having said that, here is what you need to know in a nutshell. Sprint recently acquired Clearwire who had a pretty decent / large Wimax network in Columbus. This Wimax network is being phased out and in turn will be converted to B41 LTE. Concurrently, Sprint is rolling out Network Vision improvements that will add both 1900 Mhz LTE and 800 Mhz LTE (later down the road) to all existing Sprint towers. As you can see, the two projects are NOT the same and therefore do not depend on each other. From what we know they are not even being executed by the same teams at all. Totally different project managers / contractors working on the Clear towers vs. the Sprint towers. I know this may be more than what you were asking for, but it is the least I can do to explain the situation.
Reynoldsburg / the entire Columbus market is being upgraded to NV which will move all (read: 95% of the towers) to 4G LTE @ 1900 Mhz to start and later be updated to 800 Mhz LTE. Also, all Clear towers are being upgraded to B41 or 2500 Mhz 4G LTE as well. The NV towers are already being upgraded and if you make a small donation to this site you can gain access to that information. Which includes full Google Maps with information on expected completion date / progress to date. We do not have a ton of members in the Reynoldsburg area so that would be great to get you added so you can scope some towers by you to see if the work is completed.
The HTC One has access to only 1900 Mhz LTE while the N5 has access to 1900, 800 and 2500 Mhz LTE.
Keep the questions coming.