Just write your number and you should receive SMS or call with code. Or you can use app for smartphones called Authy.

same here...
do not work for me..
and i do not found any detailed hot to to withdraw my small btc balance!!!

i checked and it worked for me, i received SMS from them , luckily for me i didnt invest and also cashed out before Cheesy

authy don't work for me...
and my cahs still on zencloud server....

really bad services...

hate zenCloud...

this looks like the official thread on bitcointalk: https://bitcointalk.org/index.php?topic=720322.0
also my google search turned up this too :https://bitcointalk.org/index.php?topic=809563.0