Sorry mate, it's practically impossible to free reverse lookup cell phone numbers : Land lines perhaps (with the Whitepages website) but cell numbers No.
The large cellular phone companies hang onto this information for dear life. And we would love to think that it's because of their tight morals and their utmost efforts in trying to protect our privacy... Sorry to disappoint, but no, this is because they sell the information. Ahem.
And yes, you're correct about the websites advertising "Free reverse lookup cell phone" I spent hours going through these "free" websites and for me it always ended in a pay for the final report page. The funny thing (depends if you have a sense of humor for these things) is that they say the "search" is free but you have to pay for the report ...
... I think Homer Simpson said it best, "Doh!"
The good news (finally): There are some reputable online websites who charge a small fee for a reverse cellular phone number look up. I understand why they have to charge - it's because they bought the info from the big cellular phone companies who charge them. And so these websites who bought the info have gone to the expense time and hassle of sorting all the info into a large directory and uploading it to the web. It's this convenience that schmucks like us have to pay for.
Through trial and error (lots of trial and error) I finally settled with Reverse Cell Phone Lookup , they have one of the biggest data bases, and supply quick and complete reports - beware of those who supply only a surname and then a list of possible first names matches??!
A final bit of advice : If you opt for a paid reverse cell number look up then make sure the website has a once-off fee that gives membership (usually for a year) and also allows as many searches as you like. Avoid like the plague websites who charge per search.
Good luck with the searches and I hope that helps with the free reverse lookup cell phone debate. All for the cause.
Salute.