On a friends recommendation, i used Matrix international sim card for UK and was glad that i made that choice. With the post paid option, i had everything sorted, didn’t had to run around recharging my phone every day! Was able to access my emails on my Blackberry and the cheaper calling on CUG was an added benefit on the matrix sim !! The final billed amount was directly debited from my card and wasn’t more than 3k. Quite convenient service guys!