How to find a lost iphone without using icloud?

How to find a lost iphone without using icloud?

You can't find an iPhone unless and until "find my iPhone" is turn on before it lost. But one possibility to find with IMEI number, better contact apple support for further assistance.

If you don't want to do it that way you're reduced to looking where you know you had it last.

Unless you had another tracker app installed on it you don't.

The old fashioned way. By looking.