How to find a lost iphone on silent?

I don't have any app called Find my iphone

Go to iCloud.com. Log into your iCloud account if you have one and put your phone on make a noise.

Go to icloud.com you can do something there that has to do with a lost iphone

Well then it would just come down the old look method.

Had you had Find my iPhone installed you could used it to sound the alarm even if on silent.