To know your balance you can dial *143# and go to the menu for balance.
You can also sign up to "My Account" found in the upper right portion of this webpage and then check on your latest postpaid balance.
Also, a call to 211 (mobile) or 7301000 (landline) can let you access your balance.
We do not know if your plan has an allocation for free data. Please review what you signed up for or you may want to inquire through 211 or 7301000 or through the different channels found in Contact Us for the contract you signed up for.