Waht to do if i can't contact the previous owner?

if you cannot contact the previous owner, the phone will need to be recycled

I have an iPad should I take it to the Apple store?

They can recycle it for free, yes.

aija258 wrote:

I have an iPad should I take it to the Apple store?

Note that they won't unlock it for you: however as stated above they will responsibly recycle it for you.