Smartphones allow users to make calls and access features like email, internet browsing, and office document editing. They have changed how people communicate both socially and at work, though overuse of phones while driving can increase accidents. Smartphones help users stay connected through cellular networks and Wi-Fi to social networks and contacts anywhere. They also provide organizational tools and potentially business tools, though small screens, keyboards, costs, and incompatible websites pose disadvantages. Overall, smartphones are very useful for modern life and work.