Are you looking for the stock ROM of your device Otto F3s? If yes your answer, you are on the right page. We have given the direct link to download Otto F3s stock ROM.
Download Otto F3s stock ROM from here, flash it in your device and enjoy the native Android experience again. The download file contains the USB driver, flash tool, and the scatter file.
Download Otto F3s Stock ROM
Stock ROM File Name: Otto_F3s_MT6580_5.1.zip
Stock ROM File Size: 711 MB
Android OS Version: 5.1
How To Flash Stock ROM On Your Device
Step 1: Download the stock ROM zip file given above and extract it on your computer. You will find SP flash tool and Android scatter file after extracting.
Step 2: Now download Otto F3s USB driver and install it on your computer. In case if you have already installed USB driver on your computer skip this step.
Step 3: Next, switch off your Otto F3s smartphone and remove the battery (if it is removable).
Step 4: Now go to the extracted folder in Step 1 and open up the SP Flash Tool sub-folder. You will find “Flash_tool.exe” file in it. Launch it.
Step 5: Once SP Flash tool is launched, click on “Download” tab.
Step 6: Now, click on “scatter-loading” button in the download tab.
Step 7: Next, click on “Open Scatter File” and select the scatter file from Step 1. For reference see the image given below.
Step 8: Now click on the “Download” button to start the flashing process.
Step 9: Next, connect your Otto F3s Android device to your computer through original USB cable (without battery – if it is battery removable) and press volume up or volume down button.
Step 10: The flashing process will begin momentarily, and it will get completed in a minute or two. Once it is over, you will see the “Download OK” green ring in SP Flash Tool.
Step 11: Now, close SP Flash tool on your computer and unplug your smartphone.
That’s it. Now you have successfully flashed stock ROM on your Otto F3s Android device. If you encounter any issues while following this tutorial, do let me know via comments.