Requires consumer or small business account. Eligible Plans: Unlimited Basic Plan. Customer with 2 lines may add a 3rd line and receive a $10 credit per month for 12 months. Customer with 3 lines may add a 4th line and receive a $5 credit per month for 12 months. Only one credit allowed per account. Customers cannot combine 3rd and 4th line credits. Credit based on Unlimited Evolved Basic; customers can pay difference on Unlimited Evolved Everyday and Even Better Plans. Additional terms apply. See http://uscellular.com/terms for details including obligations to serve Kansas customers. ©2021 UScellular