New B3310 not charging via usb problem....
 

Hi mates.

Recently got 6 units. 2 of them unlocked ok. the other 4 cannot. The thing is that these 4 when connected to the USB cable are not even recognized... not even charging. The other 2 were immediately recognized and started charging and so could be unlocked as driver was installed successfully.

Is there some setting to enable usb charging pls? Or some secret menu for this model?

thanks for any help