How can I locate my iPhone?

RyAyb wrote:

My I phone I cannot find.

[Re-Titled by Moderator]

One app to find it all.

iCloud+ - Find My - Apple

log in here on-line Find My

https://www.icloud.com/

If the battery has run down, phone was powered off or the phone does not have an Internet connection where it is located then you cannot do anything if it is offline. Any remote erase requires the device be actively connected to the internet in order to receive remote commands.

See the following support document.

click here ➜ If your iPhone or iPad is lost or stolen - Apple Support

If you have a specific issue, then explain what that is.