How to activate iphone 4s

You device is saying 'No Sim' see If you get an alert about the SIM card in your iPhone - Apple Support.

No. There is no way to bypass the activation lock. Return the phone to wherever you got it. If you can't, then turn it over to the police. It's likely stolen. Activation lock is doing exactly what it's designed to do. It's making a stolen phone useless.

Kasamdabir wrote:

I want to remove apple id,i cloud from my iphone,but i don't have contact with old user.

If you can't contact the previous owner, the device is useless to you. Sorry.