Oppo A31u Oppo A31u Rom List Oppo A31u_11_A.01_OTA_001_all_wipe_201505271620A31u 1 download975 MBFebruary 1, 2019 Oppo A31u_11_A.03_OTA_003_all_201512091445A31u 1 download 822 MBFebruary 1, 2019