i lost my Iphone how i get emi no

This is a user-to-user technical support site, nobody has access to your IMEI number. It is on the box the phone came in or check with your cell service provider. Is this for insurance?

Neither we (users like you) nor Apple know it, sorry.

Perhaps your carrier, or the shop where you bought it, could have it. Or you, if you still have your device box, could find it.

Regards

Giulio