ubiByte

Hello guys, I am really intrigued about the idea of modding apk games I really want to mod a few games. I modded an apk file but I can never get it to work on my phone. I am doing something wrong I suppose. I was wondering would it be possible for someone to create a tutorial that explains in detail step by step how to mod an apk and then rebuild it so that it works again. I would really appreciate this, thank you.