My Z9X Won't let me install any apks at all. I have tried 3 different versions of ZDMC and it just says "APP WAS NOT INSTALLED" I have tried from USB Stick and internal storage. Nothing works. Even the HT update file to fix crashing issues on the latest firmware will not install. NVM A factory reset fixed it. Funny I can't even count how many times I've had to factory reset my device in the last 3 years must be about 15 times and my Nvidia Shield only once... Yet the prices are about the same lol.