By the way, regular readers of these pages will be astonished to discovrr that I just switched to Telstra!
None of the smaller, better quality ISPs were able to port my number. Apparently it can be difficult where, as in my case, the copper connection goes via a shared exchange facility which has both Optus and Telstra equipment in it. I had to go to a major telco. Primus said they could do it but only by (a) changing my Internode ADSL/voice connection over to Primus, keeping the number, and then (b) transferring it to Primus NBN. Internode couldn't do it at all. Iinet apparently could but I didn't especially like their deals and ever since Netfix came along, Iinet has had huge performance problems fromlate afternon and into the evening. (The once-excellent Internode is now an Iinet subsiduary, same applies.) And bloody TPG has bought them out now, so service standards will go down, down, down infuture.
Westconnect couldn't do it at all. Ditto Skymesh.
I only called Telstra because I couldn't understand their 16-zillion different offers page well enough to cross them off as too expensive! But the salesgirl had the sense to hand me over to someone in tech and he said it would be no problem at all. I actuslly believe him and expect a good result. (Yes, from Telstra! They really aren't the ssme company they were in Sol's day. Thank god!)
So I wound up paying $90 for 400MB including phone, with all local, national, and mobile calls free. That's about $10 more than I wanted to pay, but nothing like the 80% extra you usually expect with Telstra. So I went with it.