Dude, Airtel GPRS is what Is keeping me alive .
Here is the thing , I am new to Bangalore and i have no permanent place to settle down so in my friends laptop I use Airtel GPRS . I read a lot of forums and lots of footie websites and I use lots of internet.
Connectivity : If you have a 3G phone better select the network as 2G . Do that If you want good speed on the GPRS/ EDGE.
Signal : I get great coverage in both 2G and 3G.
Speed : I get 56-70 Kbps when I use it between 10am to 10 pm. At night I get around 118 Kbps ( Not download

).
Plan : 2GB 98/- . I End up finishing 1.8GB . I download occasional songs from Ares also .
What I use : I have Facebook always opened . I connect to Twitter using Tweetdeck which remains connected all the time . I use Skype also at the same time .
With these 3 open all the time I can surf one more website at decent speed but when you open 2 , It will start crying .
I have heared that Voda is also good here . I also have docomo as in my other phone which sucks to the core . Only good thing about that is 2p/1sec International Calling at 27 a month .
PS : With all due respect , Udipi district is not even half of Bangalore leave alone Karnataka .