Same problem with SD card
Just received a brand new Y Duos.
Installed a previously used 4 GB card. After that extremly slow reaction for resume after standby, message "SD card unexpectedly removed".
This happens everytime when resume after phone went into standby.
Brandnew phone, no contacts, no additional apps, no nothing.
Tried to format the card in the phone as well instead of Windows. Same result.
Then I changed the 4 GB card to the originally delivered 2 GB card ( both sandisk) and it all works well.
No problem at all.
Seems this problem is related to same cards.
Original installed 2.3.6 OS