The major problem with the lookup cell phone number service is that when the directories of this service provide information, it does not seem to be accurate.  This happens with the free service mostly.  The use of a paid directory would be a best solution for this.  This might involve a small fee.  But the information that it would provide would really be amazing.  This service would provide the number, address and the service provider along with the other vital information also.  But the problem is there are many people who do not want this cell phone directory service.  It is because they would want to maintain their privacy but this thought makes it very difficult in finding a cell phone number.  The other reasons why people combat against this service is because of their fear towards the telemarketers and also all the private information would be known to everyone.  These are reasons why a cell phone directory is not required.