Just Google it, or even search it out here at MR. Photos going missing (particularly after an update) is a relatively common occurrence with the iPhone and has been in all versions of iOS. I have been exclusively using iCloud for a backup and the photos are gone from there, too. I suppose it's on me that I didn't back it up to my MAC but I didn't think I had to. This stuff is people's lives and memories, the fact that Apple doesn't take it it seriously is disheartening. In most cases, if you look around, you will NOT get them back without a hard copy backup. What's even more disturbing is not knowing why it did it in the first place, over a thousand photos are just gone. Poof. It's hard to remain loyal to Apple when they refuse to address such a well known and widespread issue.