What is the correct method to reset an unresponsive iPhone?

The method to reset an unresponsive iPhone involves holding down the sleep/wake button and the home button simultaneously. This action is commonly known as a force restart or hard reset. This technique is particularly effective for troubleshooting issues when the iPhone is frozen or unresponsive, as it prompts the device to reboot without going through the normal shutdown process.

By performing this action, the operating system is forcefully engaged to stop any unresponsive applications or system glitches, allowing the device to restart and return to normal functionality. Each iPhone model may have slightly different button combinations depending on whether they have a home button or not; however, for models that do include a home button, this specific method is widely recognized and taught as the standard practice for dealing with unresponsiveness.

The other options listed do not provide the effective procedure for resetting an iPhone. Simply holding down the sleep/wake button alone will not trigger a reset, removing the battery is not an option for most iPhones due to their sealed designs and may lead to further complications, and plugging into a computer to restart the phone may not necessarily solve the issue if the device is completely unresponsive.