Hello all
I have K850 the problem is as follow:
when I turn it on without sim it starts on and keeps work ( with Demo state)
but when I insert the sim card the problem start as the screen goes black (like the device restart the power) alot of time
start then turn off ,start then turn off sequencialy,,
I make an update from the Website ,but it give me that the software is up to date
so I can't update the device
shull I have to take it to an service office to make the download by BOX
Thanks
Anas
