Download marshmallow rollback from Huawei site and put it on sd Create in the root of the SD a folder named dload and put update.app. Turn on phone holding vol up+down and wait. Sorry for bad english----- Post added at 09:46 AM ----- Previous post was at 09:34 AM -----There are 2 part for rollback your huawei p9 1.1K Share 171K views 2 years ago #Huawei #SmrityComputer How to Fix Huawei Mobile Auto Restart Problem, Huawei Restart loops Solution. In this video, I will show How to Fix Huawei Mobile Auto I have a Huawei P9 EVA-L09C02B357 that lately it automatically reboot about every 2 minutes. The interesting things is that it happened only if I boot the ROM (stock or not). But in recovery mode (or erecovery) or fastboot mode, this automatic reboot doesnt manifest. Restarting the HUAWEI P9 LITE 2017 clears all background services and may fix the phone’s charging problem. A reboot also refreshes the main components of your HUAWEI P9 LITE 2017 in case one of them has crashed while performing a task. To perform a quick reset, simply press and hold the power button and tap the Reset option. How to fix Huawei P9 lite App Freezing problem? Force Reboot your Huawei P9 lite phone. Ensure that you are using the latest OS version. Go to settings → Apps → Select the freezing app → Storage → Clear Cache & Data. If the above step doesn’t work, attempt to Factory reset. Can’t Download Images from WhatsApp on Huawei P9 lite 6. Download a stable version of in order to perform Huawei P9 lite root. Just unzip the respective file and copy the SuperSU zip file to your Huawei phone. 7. Now you can also unplug your device from your system. Put it into the TWRP recovery mode by pressing the Home, Power, and Volume Up button simultaneously. 8. The cmd code: ''fastboot'' does not give the wanted result (not found). As windows does not recognize the correct phone, I tried to install a new Huawei USB driver. The problem is, that Windows says the Android Sooner driver is already the best driver available. * Android reboot reason: AP_S_COLDBOOT NA. Volumekey_down_press_process_func The only thing to integrate is that your Huawei P9 will have to be turned off to activate the Recovery Mode (if it is blocked, wait for the battery to discharge completely before doing so). Try one of these techniques to activate it: Hold down the volume up button and the Power button for several seconds. Hold down the volume up button, volume Are you sure you run from inside the folder where adb.exe and fastboot.exe is? Boot to bootloader and use terminal pointed to fastboot.exe. Shift+right click -> open command line here. Make sure your devices is listed: adb devices. If device is shown: adb reboot bootloader, to reboot to bootloader. If not, install adb drivers / huawei drivers. Reboot your Huawei P9 lite every day. Restarting the phone is the most common method used to fix several issues. The process of rebooting the device shuts everything off that is working in your device and restarts it again thoroughly. This allows all functions and apps to start afresh, eliminating problems and reducing fast battery drain. hs1WS.