Why can't I airdrop to other iphone
I have 6s and wife has iphone 7. Both are up to date with IOS 11.1.1. Both of us were cleaning house of unwanted pictures on Photos. I needed to airdrop a few of mine to hers, but her iphone does not show up. I checked the settings on both iphones and they are the same with accepting/sending airdrop to everyone. The only receiver of airdrop that shows on my iphone is my iMac. Neither her iphone nor her MacBook shows. Before the upgrades to IOS 11, we were able to airdrop easily between our phone.
iPhone 6s, iOS 11, 16 Gb