How to use my iphone 5c without a sim card?

So i recently found this iphone 5c at the beach and i dicided to keep it after an hour of searching for the owner so i reset it and erased everything on it and i can't set it up because it says it has no sim card and when i put a sim card it says to put in te users ickoud account and i don't know it so yea what can i do

Nothing you can do… Its attached to the owners icloud… Lmao… 1 of the coolest hack proof locks ever made…

personally, i would love to stick it in the microwave… 1 less iphone in the world… Lol

Simple.
Take it to the Police Station and stop being a THIEF.

There's nothing you can do. ICloud activation lock would prevent you from doing anything.

Mine I reset and I watched YouTube videos and it did not work Help