After flashing my N9, I installed wazapp and tried to set up a new account. at first, it did not work ( I did not get the SMS activation code). So I got it using bulestacks but it did not work because I got a number with 6 digits and hyphen (something look like xxx-xxx).

but since I already have a backup for my apps and personal data from Nokia Suite, I restored my backup to the phone and guess what! (Wazapp worked again)

So if you have a backup, try it. It might work for you too !