Tracked by Evreward since 2011, Boost Mobile offers coupons, cash back rebates and rewards, with savings as high as 15% off. Boost Mobile discount coupons are infrequent, only available a couple times per year, but are often more valuable than similar merchants. Even when Boost Mobile doesn't have a coupon, you can always get up to $49 cash back, and other great rewards, with every purchase.