The migration of a mobile and wirelessly connected society is proven to be a double edged sword when it comes to the the evolution of practicality of tools and services that have been helping people to a comp which important tasks for years.
For example, there are a lot of people today that have smart phones with reverse lookup capabilities built-in.
With reasonable reliability, it's possible to use the services to get information about unknown callers straight from your mobile device.
With incredible conveniences like these, one has to wonder if traditional reverse phone lookup services that require an actual visit to a web page are necessary at all, let alone useful.
Anyone that's ever used the built in lookup capabilities on their smart phone for an extended period time knows that there absolutely is still a place for the more traditional types of services, because the mobile ones, which typically come free as a built-in feature when you purchase your cell phone, have serious reliability issues.
In my personal experience, regardless of the type of number that was calling my cell phone, the reverse lookup function on my Blackberry failed to successfully resolve the origins of the phone number at least a third of the time.
Premium services of this variety, on the other hand, have never failed in this regard.
The difference is that the web-based directories have a dedicated purpose, and are specifically built for this one function.
As such, they tend to be much more focused on putting reliability and prompt service first and foremost.
If you're the kind of person who runs a business where your smart phone is an integral piece of equipment, that type of accuracy and reliability is absolutely necessary, and infinitely useful, no questions asked.
And you can take that to the bank!