I am unable to sign in my Apple ID into this new iPhone I jus purchased from a friend

Hello! If you already have an Apple ID you should be fine, but if you don’t have, you should create it on another device with this link: https://appleid.apple.com/account (incl. on Android and Windows devices) and use it to sign in because this iPhone has been used to create many Apple ID’s and you can’t create a new one on it for a period of time.

Have a great day!

The information below is what the Original Owner of this iPhone should have done Before you took Ownership of this iPhone.

If they have done this, the best you can do is return to them and ask for a Full Refund.

Link below

What to do before you sell, give away, or trade in your iPhone or iPad - Apple Support (CA)