The document summarizes an ambient advertising campaign launched by Swisscom and Samsung in Switzerland to promote the launch of the Samsung Galaxy S4 smartphone. The campaign involved interactive installations in public places that captured people's reactions without their voices, which were then uploaded to YouTube and went viral with over 4 million views. The campaign was highly successful in raising awareness of the new phone and its features, with over 1 in 3 Swiss people estimated to have seen the campaign.