I was using a vodafone sim previously. It was not at all fast. It had expensive data plans and ridiculously dumb service. Though vodafone is successful in many other countries. In India it is just useless. After the release of jio and the advancement of airtel this mobile data service has gone down.the sim never had the mobile data working properly. The whole sim was like a vlbig virus to my mobile.
Acoording to my experience this sim is not at all good. You may have thoughts about buying this sim, but I prefer you think over again, as once you buy it you will understand the situations or problems.