Read the fine print on the A1778 and A1784 http://www.apple.com/iphone-7/specs/ Models A1778 and A1784 do not support CDMA networks, such as those used by Verizon and Sprint They said this last year, but were lying. Are they telling the truth this year? Here we go again. It could be that Intel is supplying the modems for the AT&T & T-Mobile version, while Qualcomm is doing so for the rest. They all support the same LTE bands, so the Verizon/Sprint model appears to be the "best."