I have a problem with one of your Uhans S1. It came with some sort of adware/virus that installs apps without permission, even when I uninstall/disable it. Some of them marked as virus in Virustotal.com.
Name of some of the apps:
I tried to reset the phone to factory settings, and hard resetting from recovery but it didn't work.
I want a way to install a clean image of Android, or to root it in order to remove all suspicious and unwanted apps.
Thanks in advance.