rbl

I had the same problem.  Then I read an article that suggested you put the iPhone in Airplane mode first to turn off your wifi, and O.I Share connected fine to the camera... Dick

I was having problems connecting to my m5.3 and found a solution somewhere...??? Try setting your phone to airplane mode before trying  OIS setup from the cell phone....  Instant connection.  ...

I've found this helpful in explaining the process... https://www.clickinmoms.com/blog/focus-and-recompose-the-good-the-bad-and-the-ugly/ DIck