They are the ones who wanted to do the right thing, and consolidate with AT&T. Consolidation means the spectrum will actually be used, unlike Sprint and T-Mobile that don't use most of their spectrum.
They are just whining because they don't have any low-band, and Sprint (SMR), AT&T and Verizon have a lot of it. They should just try a joint network with AT&T and see if they can do that instead of the merger. Would work better for everyone.