Yes, you can change your plan length and/or data amount.
In Your Online Account:
Sign into your account and select the “Manage Plan” section. Once you select your desired plan and add-ons, click “Continue.”
Through Ultra Mobile Customer Care:
To have one of our Customer Care representatives help you change your Ultra mobile plan, please call 1.888.777.0446.
Please note that immediate plan changes to plans of lesser value are available at the end of your current billing cycle.