Finding a dead iPhone after 24 hours can be a daunting task, but it is possible with the right steps. An iPhone that has been turned off for more than 24 hours will have its battery completely drained, making it difficult to locate using traditional methods like the Find My iPhone app. However, there are still a few methods that can be used to find a dead iPhone after 24 hours.
One method is to use a Bluetooth tracker. Bluetooth trackers are small devices that can be attached to an iPhone and will emit a Bluetooth signal that can be tracked by a smartphone app. If the iPhone is within range of the Bluetooth tracker, it will be possible to locate it using the app.