Lightning Knight via Amazon offers a selection of its LK Armor Shield Shock-Absorbent PC / TPU Hybrid Defender Cases for Samsung Galaxy S7, S7 Edge, or S7 Active for $3.99 via coupon codes, as listed below. (For each style, the eligible colors are Black, Navy Blue, or Rose Gold.) Plus, Prime members bag free shipping on all orders. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping adds around $6.) The deals: