Find my Phone

Just to be clear, it will “play a sound” IF you are using FindMy …

… on another Trusted Device, a Family Member’s Trusted Device, or while signed-in to your AppleID from here:

https://icloud.com/find

SAMKIESE wrote:

I lost my phone and it is on vibrate. Why will the sound not play for find my device. Only other think I saw on hear basic said to restart my phone but I can't do that because it is lost.

yes it will play a sound even on vibrate

It will still play a sound and if you have an Apple Watch you can make it flash too.