When will the Lumia 620 update to Win10 crash?

[WPCentral Question]

lumia 620 update to win10 crash ?

i tried to update my phone to the latest unreleased update using the developer account i made and it took a while to install the update after that the phone restart and those two gears appeared and the line under them didn't load and the screen just become black i tried to open the phone over and over again but hopelessly that didn't work what can i do to open my phone ?
help please!

 

[vivekgiri_7]

I hope your battery was above 40% while updating!

 

[ajaya p]

Re: lumia 620 update to win10 crash ?

I also face the problem. First charging your phone. When charge phone The phone screen become black you should wait until complete minimum 20-30%. After 20-30% charge the phone automatically install update.