Frankie1991 wrote:
apple store told me that is normal, as Many others phone been tryed has the same issue
Horizontal lines on your iPhone's display with loud sound are definitely not normal. These types of issues usually indicate a potential hardware malfunction, not something typical. If App Store personnel are dismissing this issue, it might be worth seeking a second opinion from a different Apple support representative or visiting an authorized repair center. If you haven't already, it may also be helpful to try troubleshooting steps like restarting the device, updating the software, or even performing a factory reset, though if the issue persists, a hardware evaluation is likely needed.