iPad Plan or iPad Cash Purchase?

Thinking of buying an iPad Air 32gb, wifi + 4G?
Which is cheaper: Postpaid or cash?

Here's a simple computation for you:

31300 (cash) vs 45800 (1700/month/24mos + 5k upfront cash)
Plan is 14500 more expensive.
You pay P604 extra per month for 24 months.
But plan comes with 65 hours of LTE so you might not have a need to pay for a separate wifi bill. In short, you save by purchasing it via plan.

And if you put your unspent cash in equity stocks (since you opted for a monthly payment) then in two years you would already have reached a break-even.

~your financial adviser
PS
I took my own advice.