TeNppa

For me I got super annoyed by the taskbar not hiding and unhiding correctly. Other one was the search not working correctly on start menu and many times just stalling and nothing happening.

Those were the ones that broke the camel’s back.

I just upgraded from X3 Pro to X6 (non-pro). The amoled itself is a warrant for the upgrade along with the software updates. This phone has headphone jack so you might be more interested in the non-pro version