How can i create a search engine for a telephone directory book accessible via cellphone?

a search engine that when you sms the name of person or company you looking for, your service provider would reply you in a considerable amount of time with the contact details.This will come handy for businessmen unlike of spending hours looking for a telephone directory or carrying one would just be cumbersome.How can i create a search engine for a telephone directory book accessible via cellphone?
Your wasting your time because there are loads of them

already in existence.



Also you would be infringing someone's copyright somewhere

along the line into the bargain!How can i create a search engine for a telephone directory book accessible via cellphone?
Dont most contact lists in cellphones/mobiles already do this? Most let you type a letter in or name , number or whatever to lookup a contact quickly.