Download Android Nougat 7.0 for Nomu S10 Smartphone from here, here or here. Download Android Marshmallow 6.0 stock firmare for Nomu S10 Smartphone from here. Download previous version 1.0.4 from here.
Freeme OS Firmware details
OS: Android Nougat 7.0 stock firmare
Image file size: 1.06 GB
Platform: Mediatek MT6737T
Inside archive: firmware + SP_Flash_Tool_exe_Windows_v5.1616.00.000
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.