Robocaller. "Hello this is Alice calling from the underwriting department regarding your Discover Credit Card account. Based on your recent payment activity and balance you are eligible for an interest rate reduction to as low as 1. 9%. To take advantage of this limited time offer. Please call Card Member Services directly at 1-800-694-0048. Once again that's 1-800-694-0048. This will be the only notice you received and this offer is only valid for three business days. Thank you." BRIDGEVI