Recently Nordstrom Rack retail stores implemented a mobile check-out system.

FORBES: Nordstrom Rack Listened

The proposal will include requirements that mobile phone companies alert customers if they are about to rack up abnormal fees, such as those charged for sending too many text messages or downloading too much data.

CNN: U.S. aims to regulate mobile 'bill shock'

We know our customers value fast and convenient service and we want our Rack stores to have the tools and capabilities like mobile check-out devices to take care of the customer on their terms.

FORBES: Nordstrom Rack Listened