Guys I checked my recharge history. They not only did prime recharge for free, but also did the 303 prime recharge on my number without me paying a penny. They recharged it on April 5th when summer surprise was about to roll back. But I checked it after I did ddd recharge today. (My account was not logging in before, so I couldn't check the recharge history).
One more thing to note : I had not used this sim since November. I switched in on just 2 days ago.
So does that mean that I will get 5 months in all (3 months of summer surprise + 1 month 303 + 1 month ddd ?