Before using iPhone, review the iPhone User Guide at support.apple.com/guide/iphone. You can also download the guide from Apple Books. Retain documentation for future reference. For safety, handling, and support, see "Safety, handling, and support" in the iPhone User Guide. For RF Exposure information, go to Settings > General > Legal & Regulatory > RF Exposure or apple.com/legal/rfexposure. iPhone batteries require trained technicians for repair to avoid damage and potential hazards. Batteries should be recycled or disposed of according to local regulations. For charging information, see "Important safety information" in the iPhone User Guide.