Most of the people worldwide find the cell phone handy and use it mostly. Since the cell phone numbers cannot be found in a book, you can make use of a cell phone directory. It is so convenient and effective. You can lookup cell phone number in a jiffy using the cell phone directory. It gives you faster results and you can also find people with landlines on an online phone directory freely. It can be life saving to have a cell phone directory. Especially during the time of crisis you can find the cell phone directory to be very useful in contacting a person whose number you do not know. When the person does not own a landline this facility can be of greater help. It’s the age of the cell phone and you can find the use of cell phone directory also to be very beneficial and helpful.