LOST IPHONE!!!

You can use FindMy to find your device. It must have FindMy enabled, it must be powered, and it must be connected to a network. Follow these steps: https://support.apple.com/en-us/HT201472

dmk393 Said:

"LOST IPHONE!!!: Can I find my iphone through a reliable program other than icloud?"

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Backtrack Your Locations:

You could program yourself to backtrack your locations. You'd simply set it to go to recent locations such as retail stores, and then ask the store manager if it has been placed aside by the store manger. Another setting is to dial it, seeing if it rings in the other room.