I can tell you that if you are trying to trace a cell phone number and expecting it to be free, you are wrong. There is no such thing as a free reverse cell phone lookup.
If there are any websites that offer this service for free, doing a lookup on a cell phone number for free, you will only get disappointed at the information that they will give you. It is either wrong or outdated; mostly it is the wrong information, because even getting a hold of outdated details for a cell phone number can be illegal and costly.
These sites are probably running illegally. Some even prompt you to download something before giving you the information you needed, that “something” are most likely to be spyware or adware to gather all of your personal data on your computer, and can even spy on you.
As you can see, there is always a catch if these websites offer a very costly service for free. You are way better of paying a small fee to get the accurate and updated information you needed. Plus, your searches are guaranteed to be legal and confidential.
Read my post on How to do a Reverse Phone Lookup for more information.