I’m sorry that my previous comment was moderated by Alldocube, even though there was nothing offensive in it. I just wanted to respond to the earlier suggestion that the cause of my complaints would be hardware-related. No, it’s definitely a software issue. After flashing the firmware, the device would generally work more or less for a while, even after installing my applications from the Google Store. The most annoying “device corrupt…” error during boot-up always occurred later, and not even directly after installing a new application. I ran almost all the repair programs I found in the Play Store, and they all reported the device as flawless, and the store’s control function also showed the applications as flawless. So, I maintain that I ended up with a fundamentally flawed first-series device. By the way, it’s telling that “T802” is written on the back, but of course, you can flash T811 firmware onto it.