Eric, it is all well and fine to say try this, try that try, the other, the problem is in the Upgrade not individual iphones or Ipads. I have asked several people I know if they have a problem most of them said "Yes the ones who said no all bar 1 said they hadn't upgraded since the last upgrade" the 1 who said no also said he didn't know as he doesn't use air drop. I decided to see if I got the problem after upgrading my Ipad so I upgraded the Ipad and bingo same problem "No people found", this was not a problem until yesterday after I upgraded, the ONLY thing that has changed is the software version on my ipad the iphoone was already on 16.3.1. Before the upgrade my Iphone & Ipad were happy to play in the same sand pit, My sisters Iphone & Ipad were happy to play in the same sand pit as my devices now all I get is "No people found", my sisters phone & pad are on a different account to mine, I could see both her devices and air drop to them on my Ipad and Iphone, now, since the upgrade nothing