Prepaid Phone Plan Better than Postpaid?

Consider the prepaid option for your cell plan. It might be cheaper than postpaid, even after discounts!
Spreadsheet download: https://www.amazon.com/clouddrive/share/tyr3vfpmdv3IgDMeeu0eoWj0GVXTeLXuzY0TCjqGcJP

My final choice: AT T prepaid 8gb/line, 2 lines = 70$/mo ~71$ after tax
2nd best in my opinion: Verizon prepaid 15gb/line, 2 lines = 75$/mo