ZTE Boost MAX+ N9521 Case, Mellonlu 3D Bling PU Leather Slim Protective Flip Wallet Case for ZTE Boost MAX+ N9521 Designed Specifically for ZTE Boost Max+ Plus N9521. Made of high quality PU leather + magnetic flip design. Made to fit your device perfectly with all ports and buttons accessible. Keep your phone in like-new condition well and preserves its looks and features. This wallet / phone case combo eases your burden by allowing you to carry credit cards, ids, and cash in the same place as your phone.