Rs. 549 plan for 180 days (+7 grace days till Incoming works)
So, 549/187= Rs. 2.94 per day
Rs. 99 plan for 28 days (+7 grace days till Incoming works)
So, 99/35 = Rs. 2.83 per day.
So, plan 99 is better.
Hassle is, you have to recharge 5-6 times instead of 1 time
then its 2.4/day and you also reduce no of recharges