Name changed for this - Sorry if this seem trivial, I know people are dealing with far bigger things at the moment.
I found a phone lying on the ground, about 5 yards from my house.
We live in an isolated property about a mile away from the first road. We have not have any visitors , maintenance people for many weeks (obviously). Delivery drivers, yes, but they would not have any reason to go to this part of the garden/couldn't access it during daytime without us seeing something.
At first I assumed it belonged to one of us, but no! 
Phoned the police, have a ref./case number, etc. but they're busy and will get back to us when they can.
The police said to take the phone indoors and wait for their call/visit.
I am worried that the next visit is going to be from whomever the phone belongs to.
The phone is dead as a dodo but I assume it still can be found?
What should do?