The OP did not ask about an iPhone 5, he specifically referred to a 5c/5s. A Verizon 5c/5s will work on AT&T and T-Mobile and receive LTE just fine ... documented on this forum, many times! AND, it can be activated again on Verizon at any time! This is all an aside from the original intent of the post, but again ... stop posting mis-information.
i'm not posting any misinformation. I misread because i saw iPhone 5 in the OP.
Yes the 5C/5S will all work with all LTE bands on VZW/ATT/Tmo because they are the same exact model, as evidenced in the link i posted. No misinformation. I posted the right info about the iPhone 5.
But welcome to MacRumors.