Are there any totally free-no strings attached websites to do a reverse lookup for cell phone numbers?
I have spent the last several months researching and testing reverse phone lookup sites for an online consumer review site (http://www.CompleteReviews.net ). Reverse phone lookup on listed land-line numbers is the only thing that is free. Sites that give you unlisted numbers as well as cell phone numbers all charge fees because they have to pay to access the data themselves (not to mention the cost of creating a site that facilitates the search).
The important thing is that you go with a service that is reliable as they all charge about the same amount of money (highly competitive market). I can safely recommend any of the sites listed here http://www.completereviews.net/reversephonelookup.html as I was involved in testing each one.
Good luck in your search!