re:
Hi! You can't actually delete Safari from an iPhone (unless it is jailbroken). It is possible you accidentally moved it to a location where you can't easily see it. Try searching in Spotlight. Pull down on your Home screen from the center. Then, type "Safari" into the search field. Then, tap Safari to open it. The result will also note which folder Safari is in (if you moved it to a folder) so you can relocate it somewhere more accessible.