Latest Update: Belong removed old platform portal and only allows registration through new platform, which does not give double data. It seems that almost all Belong Mobile phone numbers have been moved onto the new platform.
I think this deserves a post as people had different exp recently.
Double data and $20 referral credits sign up through the link below. You can not access this link through offcial website now. It was the old sign up portal (old platform) that is not closed down yet.
https://www.belong.com.au/mobile/connect/1
But the problem is that once you sign up through the link above, at this moment, you can not data gift to others who signed up through the offcial access (new platform) which does not give double data or $20 referral credits and with new billing cycle policy. You can not data gift to old accounts that have been moved to the new platform, either. From my exp, the accounts created before mid SepOct have been moved to new platform.
These are my findings in a week to explain why people have different exp recently. It could be not 100% correct, but it is the best to my knowledge. I am happy to be corrected and update the post whenever necessary.
When you say you can't data gift, is the function removed from the website or it just didn't work when you try to data gift?
I have an account since last year and the data gift and referral link is still visible on my dashboard.