Walmart declares war on Amazon with new shop-by-text service

Walmart is taking on Amazon with a new shop-by-text service. The $50-a-month membership program lets harried shoppers use text messages to order items that are delivered to their doorstep. Called Jetblack, it lets shoppers buy items from Walmart.com and other retailers and marks the latest effort by the nation's largest retailer to cater to higher-income consumers. Walmart is taking on Amazon with a new shop-by-text service. It's being tested in Manhattan and parts of Brooklyn, but is expected to roll out to more regions over time.