please help
yesterday i upgrade my lumia 920 to windows 10
after that the network not working and i can't call anyone
it's seem like the software cant read the sim card
and the phone hub not working too
and the windows 10 is too slow on lumia 920
W10 TP is NOT an update. I wish people would stop calling it that. It's a TECHNICAL PREVIEW. It is not meant to be used on a daily basis if you have no other phone.