I have used almost all the international sim card ...

I have used almost all the international sim card options available in Delhi and found Matrix Sim Cards to be a clear winner in the race. I used a matrix sim card while i was traveling to UK. Although i did not face any issues with the network there, my only problem was the bill which was charged for wrong dates. Before i could contact them, the guy who got me the number contacted me and apologised for this mess up and got it corrected. Really appreciate the honesty and customer service that Matrix gives. Looks like Matrix has the best team !!