Hello Gisell1234,
The Unlimited Data Option provides additional choice and flexibility for our customers who may make heavier use of the Internet. Enrollment is optional. The Unlimited Data Option currently costs an additional fee of $30-$35 per calendar month, depending on the area. The fee is regardless of actual data usage. The 300 GB plan will not apply to customers who enroll in the Unlimited Data Option. Enrollment and cancellation go into effect on the first day of the subsequent calendar month. For enrollment, please see How do I enroll in the Unlimited Data Option?