Upcoming flights in China Southern (CZ) and they aren't part of *A or OneWorld. Appear to have own scheme "Sky Pearl Club". However after filling in the application online, I never get the SMS that is required.
Has anybody done this recently, or have any advice? I don't have a Chinese mobile number, but have tried two other countries mobile and neither seem to work. I suspect the key lies in "International telephone number must fill in the area code." - perhaps I haven't got the right combination. However, given the rest of the website, it might just be dysfunctional...

This is the URL I am using for enrolling: China Southern Airlines - Sky Pearl Club