Shoppers will be able to browse the retailer's virtual merchandise inside London train stations this week.
The Argos 'Gift box' will look to leverage QR codes – barcodes which can be scanned with smartphones – to pack 75 gift ideas into a small space. Shoppers will be able to check out products and purchase them on their handsets.
The mobile shop will be at Paddington station today and on Friday, and then Waterloo on Wednesday and Thursday
Argos' head of brand development Siobhan Fitzpatrick said the retailer wanted to make Christmas shopping "active and engaging."