"Verizon Wireless, the country’s largest wireless carrier, is confident enough in its network that it will offer unlimited data-use plans when it starts selling the iPhone around the end of this month, a person familiar with the matter said. Such plans would provide a key means of distinguishing its service from rival AT&T Inc., which limits how much Internet data such as videos and photos its customers may use each month."
That’s the word from the Wall Street Jounal (the WSJ is behind a firewall and may ask a fee to see this story.)
The article continues, "It wasn’t clear how long Verizon would offer unlimited-data plans. Its executives have said repeatedly that the industry needs to move to some form of tiered pricing—charging different prices for different amounts of data use—as mobile Internet service use rises, but for the moment the carrier is sticking to its existing plans."
AT&T also offered customers unlimited data-use plans when it first offred the iPhone. But subsequently it started to limit the data plans offered new iPhone subscribers.