The BigPond mobile wireless card costs $299 upfront, but eligible customers who sign up during the promotional period can get up to one year of half-priced access, and $129 off the price of the wireless broadband mobile card.

Middleton said BigPond has no plans to increase the limit allowance on its monthly plans and he declined to put a number on BigPond's current mobile wireless customer base, suffice to say that "it was popular."

All BigPond wireless broadband customers will be switched over to the new 3G network when it offers equal or better coverage at no extra cost, via freely supplied mobile cards or modems.