your best bet is to get over to the standard 69.99 a month everything data plan. then since your on sero you can pretty easily get retentions to offer you 20 off that per month for 2 years bringing your bill down to 49.99. from there depending on your "moral fiber" you can get 25% off your bill by using an employee discount from a place like accenture. or in the very least get the 15% credit union discount.
I did this but I added my GF to my plan an got the 129.99 family plan. after discounts it comes to 75 and change for both phones. as a bonus if you go the accenture route you can typically get smartphones for free to under 50 bucks as well. only paid 39.99 + 15 activation for my moment
www.sprintusers.com has a sero forum with experiences of people on that plan. was kinda sad to see my old plan go but it is what it is, they sell for about 75-100 and 24 $20 dollar credits was way more vaulable