I had a look at Telecom XT network plans. 

There is a broadband plan for 4GB of data.
There is a mobile Smartphone plan for minutes / txts and 1GB of data.

These two cost about the same.

I make very few calls in a month. I do send a fair number of txts...maybe 500+. 

Ideally, I'd have a Smartphone plan roughly analogous to the Vodafone Smart3 (actually a pathetic 250MB / month, but with the "3GB Promo"). But Telecom's variation doubles the minutes (I don't want them) and offers a lot more base data....but doesn't come close to the data with the endless promo factored in. 

I use between 1GB and 2.5GB / month in mobile data. I have never used more than 3GB. 

None of the plans I see fit my usage....unless I signed up for a 4GB Broadband plan and used the SIM in my phone. I guess I'd then have to pay casual rates for any phone calls or txts. Assuming I can make phone calls and send txts. 

Data overages appear to charged at $100 / GB. (10c / MB)

Anyone know? 

UPDATE: Looks like I can do a "50 Anytime" Smartphone plan with 500MB of data included, then add a 2GB broadband data plan. I use barely 15 mins / month in outgoing cell calls. Most of mine are incoming. The total is about $90 / month for 2.5GB...and I can get another 2GB for another $29.95. That sounds not too bad....4.5GB for $120 / month *if* I go over the 2.5GB quota.  
I was in a Telecom shop in Glenfield on the weekend and the woman working there hadn't a clue how the plans worked together....I'll have to refer her to their web site.  LOL!