Group 1 - The article discusses the increasing prevalence of using smartphones in wet environments, such as while showering, due to advancements in water resistance technology [3][5][7] - It highlights the contradiction between the marketing of water-resistant features and the reality that no smartphone is permanently waterproof [7][15][30] - The article explains the IP rating system, which measures the ingress protection of electronic devices, detailing how the ratings are not strictly progressive and can vary significantly in real-world scenarios [8][10][20] Group 2 - The article notes that while foldable smartphones have achieved high IP ratings, the complexity of their design makes achieving dust resistance more challenging than water resistance [12][13] - It emphasizes that the actual usage conditions of smartphones are often more complex than the controlled testing environments used to determine IP ratings, leading to potential misunderstandings about their water resistance capabilities [17][23][24] - The article concludes that while manufacturers may advertise their products as water-resistant, the real-world conditions can lead to failures that are not covered under warranty due to the limitations of the IP rating system [21][30]