Ping (and Flash) Your iPhone
If your iPhone is on silent, it can be a pain to find it when it’s lost. Unless you’re in an extremely quiet room, you’ll probably need to log into Find My iPhone on a separate device to ping your handset. But if you have an Apple Watch, the process is much easier.
All you need to do is open up Control Center on your Watch and tap the Ping iPhone button — which will play an audible sound on your iPhone even when it’s on silent. You can also tap and hold on this button to remotely flash your iPhone’s LED light.