I 'm going to explain,what I did to install whatsup.i recommend this,because wazapp stopped working for me and there are less bugs.

So first you get Whatsup.Then you install nano on your N9.
Go to Settings->Security->developer->Utilities.It should install everything on its own.
Then you Install Whatsup.Get the Code by Using WART.
write down both codes.
Then you start whatsup and type the (i think) first code.It should start and maybe connect.If not.
open terminal.
type "nano" without the "" and press enter.
than press ctrl-R -> press enter
type in " /home/user/.config/cepiperez/whatsup.conf " press enter
than a file should open.move up and down by using "ctrl-V,ctrl-Y,ctrl-P,ctrl-N.
move up until you come to
username=...
password=...
delete the old ones and type our mobile number as username (without +) -> username=4412345678
and the second code from WART (the long one) as password ->
password=87654321asdfgh
than exit nano by ctrl-X (the shortcuts are written in nano terminal as ^X for ctrl-X) and save.
look if it works.Maybe you need to save before you exit by ctrl-O but i don't know which name of file you should type.Maybe someone knows.

I hope i could help.If it doesn't work like this...somebody needs to try to explain again,or read the pages before carefully.