how to lock lost phone with imei?

[PaulCobine]

My friend lost her phone. How can we lock or locate if we don't have Smart Thing app?

[Pugs1957]

Try Android device manager in Google. Also it's Find My Mobile in Samsung, try logging in using the Samsung account details.

[PaulCobine]

Thanks I've sent your reply to het

[Pugs1957]

Hope she gets it back.