Before, whenever we needed to get information about the owner of a certain cell phone number, the only option was to acquire the services of a private detective which would cost hundreds of dollars and takes a couple of weeks to come up with answers.
This is because the white pages or any other phone book does not list mobile numbers.
Nowadays, almost everything is done through the internet, including reverse phone searching.
All you need to do is find a reliable source online.
Reverse mobile lookup is done due to the following:

• To find out if their partners are being dishonest, which only takes a couple of minutes to identify the number that they are calling
• To catch irritating prank callers
• Other reasons like checking who their children are talking to, avoiding bill collectors, etc.
  

What is the most effective way of tracing a cellular phone number? Unquestionably, online reverse phone lookup is the best way of getting information about an unidentified number.
It is fast - you get results in a couple of minutes, reliable, and the information you acquire is 100% confidential.
It can also be done at the privacy of your home, and you can access not only the name and address of the owner of the number but also their immediate family members, place of work, the neighborhood, etc.
And, you can unlimitedly search the database for different numbers.
How do I pick a reliable service? Are all of them the same? 2 Useful Tips! Not really! Not all of them are equally good.
In choosing an effective online lookup service, you have to consider the following factors:

1. A database that regularly updates its system for you to get accurate and reliable information - otherwise you may get info on previous owners instead of the current owners
2. A database with a comprehensive amount of information stored, with at least 200 million numbers - otherwise it's like catching fish in an empty tank!