In modern technology today cellular phone is one of the most developing gadgets that everyone considers it as a basic need. Millions of people around the world use cell phones having different models and features.

These days cellular phones provide an implausible array of functions, and new one are being added depending on models. Almost all are capable of sending or receiving e-mails GPS and Internet Browsing.

Cellular phones and Internet are now the very powerful and the number one information sources. If you are researching very important information and looking for something internet can provide you almost all that you need.

There are many cellular phone numbers where every time a user changes its service provider. So the telecommunication has established local number portability. This requires the users or customers to keep their numbers even when changing service providers.

A recent survey was conducted by the Yankee Group found out that 49.8% of residential users who initially expressed interest in changing carriers were not willing to do if they were unable to keep their phone number.

According to Boyd Peterson, among business customers for whom changing cellular phone numbers would entail the expense of reprinting stationary and materials and who often have a kind of brand equity in catchy or easy-to-remember numbers--that percentage is undoubtedly higher.

Aimed at increasing competition, the concept first appeared in the long-distance market in the early 1990s, when toll-free numbers became portable between carriers.

Local number portability is a huge responsibility, requiring significant infrastructure upgrades and a high level of cooperation between local carriers and new competitors.

Most of the work required to get local number portability underway is occurring at the regional level, where LECs and CLECs have formed limited liability corporations to establish number portability administration centers.

Presently, calls are routed to a specific service provider central office based on a local exchange. In order for a number to be portable, a new routing method had to be devised.

With location routing number technology, all carriers' switches are assigned unique 10-digit numbers conforming to the North American Numbering Plan format. Any calls to an NPA-NXX in which number portability is available require a database check.

If a dialed number has been ported, or moved to a different carrier, it is temporarily replaced with the location routing number of the new carrier's switch so that it can be routed there.

At the new switch, the dialed number replaces the location routing number so that the call can be routed to the ported customer. If the number has not been ported, the call is routed to the original switch.

For local calls between two carriers, the originating carrier would be responsible for checking the database. For local calls to and from customers served by the same carrier, that carrier would do the check. For long-distance calls, it would be the inter exchange carrier's responsibility.

Over time, however, the amount of traffic that must be rerouted by the incumbent LEC should decrease.

According to the FCC implementation schedule, cellular carriers, personal communication services providers and specialized mobile radio service operators in the top 100 metro areas will be required to support local number queries for calls originating on their networks by the end of 1998.

By June 30, 1999, wireless carriers must give customers the ability to keep their number when they move to another wireless or wireline carrier. Cellular phones will still improve and new development will boost up.