Lost my iPhone, how do I find it?

I lost my iPhone and I have looked everywhere I can think of but I can't find it anywhere. I know that nobody stole it so I don't want to reset it and get rid of all my data and everything. And I do not have Find My iPhone installed. I know there must be some way to track my phone somehow. Could I call the apple store and could they help me? Besides getting a new phone? So please help me find some way to track my phone somehow. Thanks. (and I have tried calling it but it is on silent)

1.call it. If its on silent then that doesn't work

2. If you have a different apple product, download "Find My Iphone" app and log into your apple ID.

Hope These Work

With find my iphone you can make it beep, even if muted you can make it beep.

Don't call the store. They don't care and it's not their problem. They will hang up on you and laugh. If you don't have Find my iPhone already on it, there's no way to put it on there remotely. If it's on silent, and has no other tracker on it then you are just going to have be old school and look for it. There's no other way to find it.
Try this link to make sure you didn't have it installed and don't know it.
https://www.icloud.com/...cloud.com/
Best luck.

Call the carrier to track it if you had not installed tracker app on it.