You can make changes to your Alltel wireless plan at any time without extending it. To do so, call 1-800-ALLTEL1 or visit an Alltel retail store.
You can change your plan on any billing cycle, including adding more minutes, changing to a plan with fewer minutes, or making other plan changes. There is no fee to make these changes, and your contract will not be extended. However, plan changes typically do not become effective until the beginning of your next billing cycle.