Debenhams just tweeted this and found some more info below
All of the retailers 167 stores will be kitted out with free Wi-Fi so users can make use of the Debenhams app to improve their shopping experience. The retailer has teamed up with O2 to offer the service that will allow customers that use the app to order items for home delivery, and check sizes while in store.
The company will promote the service and its application to its customers as a way of combining online and retail shopping together. Users will be able to check stock and if an item isn’t available in the correct size they can simply scan the barcode, and arrange home delivery.
There will also be discount vouchers available within the application along with a store guide that will help customers to locate goods more easily. This news follows a trail run in three stores and the popularity of the stores app for online shopping growing. So far one million people have downloaded it, and twenty percent of the company’s online traffic is now coming via mobile devices.