fastboot reboot-bootloader. fastboot flash radio .img. fastboot reboot-bootloader. fastboot flash -w update .zip. Once this process is complete, your phone should restart. If the flashing process was successful, your device will now be running the downgraded firmware image. 6 Oppo A39 Slow Charging: Possible Causes and Fixes. 6.1 Fix Slow Charging on Oppo A39; 7 Resolving App-Related Problems on Oppo A39. 7.1 Fix Apps Open Slowly on Oppo A39; 7.2 Fixing Play Store Download Issues on Oppo A39; 7.3 Fix Oppo A39 App or Game Crashes: Troubleshooting Tips; 7.4 Fix Auto Brightness Issue on Oppo A39 Oppo A39: Download and Instruction Page: Oppo F5: Download and Instruction Page: Oppo R8113: Download and Instruction Page: Oppo R11: Download and Instruction Page: Oppo A71: Download and Instruction Page: Oppo Joy 3: Download and Instruction Page: Oppo F3s: Download and Instruction Page: Oppo Neo 3: Download and Instruction Page: Oppo R809T Download and Extract the Oppo A39 CPH1605 Firmware on the Computer. Run Flash tool. Out of the icon appearing, Double click on MSM Download Tool & Enter Login Credential. It will launch the tool on your PC, Click on Start All.Then it will verify for PC Memory Checksum. Switch off your Mobile and Connect it to PC by pressing Volume down and Hai sobat Andro Kali ini saya akan bagikan tutorial cara upgrade Oppo A39 CPH1605 ke marshmallow dengan fitur yang lebih keren dan menarik. Mungkin sobat pernah bertanya-tanya bagaimana cara mengupgrade HP Oppo A39 ke versi yang lebih tinggi yaitu marshmallow karena versi Android 5 atau Lollipop kebanyakan aplikasi yang tidak bisa diinstal atau tidak bisa 7HRcAv.