Lumia 640 and windows 10 preview

[vuljanic989]

Is anybody using it? Is it for daily use? What about speed? Is it still unavailable to revert back to wp8.1 if you're on latest wp8.1 update? Because i am and thinking about tryng wp10 but not if i can't revert back to wp8.1

Tried wp10 on old lumia 520 and it was just too slow...but now i see as builds roll out performance and ui has improved
Vulja

 

[ven07]

Download the windows phone recovery tool, if it manages to detect your phone, then you can most likely go back to 8.1 if anything happens

 

[Sedp23]

I'm thinking about putting it on mines I'm actually downloading it right now