I connected my wifi with lan cable to my computer and went to the IP address given on the bottom. Got the number there.
BUT, how the heck do you get it to display as a second number under your profile on the app. My main contact number is also the current 15gb 500min one with the home data now the 1tb deal. I don't want to log out every time on the app. Cant get the OTP for the data sim on my phone, have to connect the router every time. Also don't want to do that.
Very clever lady at the call centre said it can't be linked and I have to log out and in every time on the 2 different numbers. Nonsense, saw this working on my fiend's phone. Both contracts in my name. I thought it would show up automatically.