A question of money is who is charged (monetarily) while sending the mms through http://bill.relianceinfo.com/webapp/portal/servlet/MMSLogin, the sender or the reciever.
if it is reciever then he will be charged while opening the mms, if its sender he should be charged on sending but this is not the case because i tried to send myself while i had Rs. 2 balance and i was able to send but not open it . So sender may be charged while opening by the reciever.