The phone comes with 1 year of Prime at no additional cost. So it only costs you an extra $100 if you stay on the same phone plan and would pay for Prime anyway

The phone comes with 1 year of Prime at no additional cost. So it only costs you an extra $100 if you stay on the same phone plan and would pay for Prime anyway. If you wouldn't pay for Prime anyway, the phone isn't very competitively priced.