Re: how do i reinstate phone icon.deleted in error. phone is a Lumia 520
If i'm understanding your question correctly, you're saying: You accidentally unpinned the "Phone" tile and now you're trying to figure out how to get it back.
In order to do that, swipe from your start menu to the list of all your apps -> Find the "Phone" app listed there -> Hold down on it until "Pin to Start" pops up -> Select that and the phone tile will be back on your start screen.