If you cannot set Locator
Make sure your equipment is ready.
If the setting screen disappears, press the side button or the sleep/wake button on the iPhone to the device is in sleep. Then wake up and unlock iPhone. Wait up to 15 seconds, and the animation should reappear.
If you want to set up multiple Locators, please make sure that only one Locator is close to your device at a time.
If Locator still cannot connect to your device, please reset Locator.