Here is a stock ROM firmware, MTK Backup for Opsson S1 V13.
With this Opsson S1 V13 flash file, you can flash stock ROM back to your Opsson S1 V13 using SP Flash Tool. This is mostly required when you have software issues with your Opsson MTK Android devices, need to revert your Opsson S1 V13 to factory state or unroot by flash.
Meanwhile, in most cases, flashing stock ROM on Opsson android devices corrects all software errors if you know how to do it.
Below here is the download link for the stock ROM. You may also see the tutorial page on how to flash stock ROM on Opsson and other MTK android devices below.
Opsson S1 V13 Stock ROM Download Link
Download Opsson S1 V13 Stock ROM Here
