I try to reword myself. Sometimes it is hard to follow me.
So, when I read the wiki page how to install the android port, it writes "Copy your X-Com: Enemy Unknown/Terror From The Deep files to a folder on your device", I thought it means they can be copied from the OpenXCom installation folder (C:\Program Files\OpenXCom\). I copied the UFO and TFTD folders on my phone. But it did not worked, while it works on my laptop with the same files. I did not used "something else".
When I copied the same files from the Steam folders, the android version started to work. That is what I wanted to be highlighted.
I'm just guessing, the problem could be that the android port tries to patch the files? And patching the already patched files caused the trouble?
I'm zipping the files, I will send the links shortly.