Around how much would I pay for having 2 lines on Sprint with iPhone 5?

I currently have a line for myself and I pay around $90-100 a month. I have 450 mins and unlimited texts and data. I'm thinking of getting another iPhone 5 for my younger brother but I'm trying to figure out if there are any plans out there that might help me pay cheaper per month on my phone bills.

All I care for is unlimited texts and data, I don't care much for minutes. If anyone has any suggestions I would love to hear them.

Here you go.

http://shop.sprint.com/...yType=null

$149.99 or 2 smartphones o your choice, 1500 shared minutes, both have unlimited text and data…

so about $170 per month, after your area tax rates, federal/statecountycity/town/village taxes, fees, and surcharges…