Direct dialing of 411 (Directory Assistance) is $3.00 per call plus your standard rate per minute if you have H2O® Pay As You Go plan. If you have H2O Monthly Unlimited plans, a direct dialing to 411 is currently unavailable. 
However, you can get directory assistance at no additional charge (only pay your standard rate per minute, completely free if you have H2O Monthly Unlimited Plans by dialing 1-800-goog411 or 1-800-free411.