GPRS settings

I have been bugged by different modes in which the GPRS [General Packet Radio Service] works on two major carriers here in Delhi.

Hutch & Airtel.

They both have at least couple each of APNs which let you access Internet from your mobile phone. The names with which APNs are famous are as follows:-

Airtel:-

Airtel Live - This is a walled garden kind of scenario where you can download ringtones, wallpapers etc. for the available WAP pages [you can access some specific websites (IPs)]. The IP has to be explicitly white-listed if you want to access it.
Mobile Office - This acts as a normal Internet gateway where you can access any website that you want to

Hutch:-

Planet Hutch - This is same as Aitel Live (although I believe they don't really block any website as such)
Hutch Access - This is popularly known as the Internet gateway which lets you access INTERNET

I would give some steps that would be helpful while configuring GPRS on the phone in my posts later.