I am an exporter, and travel to
Europe frequently for business. Last month, I carried a Clay International
Prepaid SIM (http://www.clay.co.in) with
me. During my travels, I was experiencing frequent call drops in the first two
days. I notified the customer care department at Clay by calling 1800-102-1113,
which is a toll-free number, and the problem was rectified within a few hours.
This was a great experience and I strongly recommend their service to anyone
who is travelling out of the country. My bill was much lower than using roaming
services on my local number. I suggest check them out.