There is a limit for the unlimited plan. From Wind page
, the $35 Surf-a-Ton has a cap of 10GB/month. Fair Usage Details
The plan, that my cousin has, is also unlimited. It has a soft cap of 5GB. Wind slows the download to 256kbps after he has used 5GB of data until the start of next billing cycle. Browsing at 256kbps is painfully slow!