Well.. i was just out of Mumbai for 5days...i had taken 4Rs/30MB/day schemewhen I was in Maharashtra circle it wud deduct balance MBs (checked using *225*6#) and not balance money.now strange thing is when I was in MP/Chattisgadh... it neither deducted balance MBs not it deducted balance money. so i dont really know whats the policy.but the next morning when i was back in maharashtra.. i was not able to subscribe to that 4Rs scheme (had to complain to CC)... so it looks like there was system problem with vodafone on that particular day, that it was not deducting MBs.so overall it looks like that the scheme works even while roaming.