It seems that there is no AWS-3 Band 66 support in the new iPhone 7. Any ideas as to why Apple may have left this out? Both AT&T have a lot of AWS-3 spectrum with AT&T having a nationwide contiguous footprint.
Sources:
Fortune
Apple:
Model A1660*
Model A1661*
FDD-LTE (Bands 1, 2, 3, 4, 5...