The Unlimited Talk, Text & Web plan gives you unlimited internet, but the first 100MB is at 3G/4G speed (and T-Mobile send you a message when you are close to this limit). However, we don't really promote the faster speed since around 99% of mobile phones in Australia will not work at the faster speed on T-Mobile's network.

So you have unlimited web on this plan. If you have a Google Nexus S or a Nokia N9 your internet will be slower after the next 20MB, but with most other phones you will notice no difference.