The SP Flash Tool is free but requires a "DA (Download Agent)" file that bypasses OPPO's authentication. This is the classic hard reset unlock method.
Press and hold both the and Volume Down buttons simultaneously. oppo cph1941 hard reset unlock tool upd
Download the MTK GSM Sulteng Tool V1.3.9 or higher and install it on your PC. Open the Tool: Launch the application as Administrator. The SP Flash Tool is free but requires