In the middle of a transfer.

Im running the AT&T Transfer app for the 3rd time. I would have rather only ran it once. I have to consider the version of iPhone Im transferring from and to. Both iPhones are running 9.3.1 Version iOS. Im transferring from a iPhone 4s 16Gb (wifes previous phone) to my iPhone 6s+ 128Gb.
Anyway, Im pretty confident that all of my wifes phone pics of our vacation (Hundreds????) to the Bahamas.
I suggest you may want to "unhide" any photos that you want to migrate.
Overall this app, for the most part, really speeded up the recovery of my wifes pictures.
I did use this app when I transferred data from my older iPhone 6+ 128Gb to this newer 6s+128Gb. It worked without a hitch.

Washougalman about AT&T Mobile Transfer