Oppo reno 6 pro back cover glass July 8, 2019 16 32 64 128 Oppo reno 6 pro 5g back glass Oppo reno 6 pro back glass Oppo reno 6 pro back glass original Oppo reno 6 pro back glass replacement Oppo reno 6 pro unboxing Oppo reno 6 pro black unboxing Oppo reno 5 glass replacement Oppo reno 6 pro blue Oppo reno 7 pro back lamination