by calling 411
by calling 444
hold the 1 button it will speed dial a number, hang up then go lok in your dialled, should work with any phone.
Nope, not yet...
By going to the place where most Indian people lives so you can ask them.
Many sites require payment or registration. The one I use that does not is http://www.pasa.nhs.uk/PASAWeb/NHSprocurement/DnBCompanyLookup.htm
Unless you know someone who have a statement or even better that works in the company of that cell phone you might, and only might. But other than that it will be impossible.