If you have lost your iPhone, it can be a bit stressful, but with the correct tools that will help to locate your device using find my phone app. The lost phone application is a pretty vital feature for iPhone users in the US. This app is used to track your iPhone, be it lost somewhere in the house or away from home. If you need to track down an iPhone, log into iCloud and navigate to the Find My page (or use the Find My app on a nearby Apple device). You will see its last known location on a map through the find my phone iPhone feature. If your iPhone is close by, you can also have it play a sound to help find it more quickly. Note: Having ‘Find My iPhone’ activated before losing the device makes this process a walk in the park. So, if you’re looking for my phone app in the US, it’s activated so you can easily and quickly trace your iphone.