![A woman holds her smartphone that displays the application "Promo C-Ou" at the Carrefour supermarket in Lille, France, November 5, 2015. Picture taken November 5, 2015. To match Insight RETAIL-TECH/ REUTERS/Benoit Tessier A woman holds her smartphone that displays the application "Promo C-Ou" at the Carrefour supermarket in Lille, France, November 5, 2015. Picture taken November 5, 2015. To match Insight RETAIL-TECH/ REUTERS/Benoit Tessier](https://c8.alamy.com/comp/2CK4E6X/a-woman-holds-her-smartphone-that-displays-the-application-promo-c-ou-at-the-carrefour-supermarket-in-lille-france-november-5-2015-picture-taken-november-5-2015-to-match-insight-retail-tech-reutersbenoit-tessier-2CK4E6X.jpg)
A woman holds her smartphone that displays the application "Promo C-Ou" at the Carrefour supermarket in Lille, France, November 5, 2015. Picture taken November 5, 2015. To match Insight RETAIL-TECH/ REUTERS/Benoit Tessier
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April 1, 2019, Brazil. Carrefour logo on the mobile device. Carrefour is an international network of hypermarkets, with supermarkets all over the world – Stock Editorial Photo © rafapress #254704848
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