With purchase of a monthly service plan, Simple Mobile offers the Apple iPhone SE 32GB Prepaid Smartphone for Simple Mobile in several colors (Space Gray pictured) for $129. Coupon code "SM20OFF" drops that to $103.20. With free overnight shipping, that's the lowest price we could find for this phone by $26 and the best deal we've seen for this phone with any carrier (excluding the cost of the monthly plan).

Note: This deal requires you to add a Simple Mobile monthly service plan to cart. (You'll be able to choose your plan when you add the phone to cart.) However, the same coupon also takes 20% off monthly plans, dropping the starting price from $25 to $20.