I upgraded to Lumia 640XL from my 620.
I can upgrade.I even downloaded the Upgrade Advisor app. But I'm gonna wait for some time so that Windows 10m Mobile becomes more stable.![]()
Well first congrats on your 640XL.
Second, for me to be honest, it's not about stability. It's about the uniqueness and the UI that is of Windows8.1 as compared to windows 10. For some reason,i hate certain UI design particularly the peoples app. It's an imp app for me but unfortunately, it's functionality is broken in windows 10 and the UI is so hideous especially the live tile.