iPhone 7 Plus is locked to owner

If you are not the owner it is locked to, then your only option is to contact that owner and ask them to go thru the in the link below to unlock that iPhone.

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

If it were me, I'd try to contact the owner for a refund. If that is not possible, then I'm afraid you will not be able to use that phone. Activation lock is a safety feature. You likely purchased a stolen phone.

The All Too Common SAD Reality of Buying … - Apple Community

Welcome and thank you for reaching out. 🤗

If you are not the original owner, then Activation Lock is a security feature to protect the owner from theft. In that case, only the original owner can unlock it. 🔓

↓ If you are the original owner: ↓

According to Apple:

Remove Activation Lock on the device

Follow the onscreen steps to enter the Apple Account and password you used to set up your device or your device passcode. If you don't remember your Apple Account, try to sign in with an email address or phone number that you regularly use for Apple services.

Learn how to find your Apple Account or reset your Apple Account password.

If your device is owned by a business or educational institution, please contact your IT department or manager. 

Remove Activation Lock on the web if a device is offline

For iPhone, you might be able to remove Activation Lock on the web even if your device isn't offline.

1. Go to www.iCloud.com/find.
2. Sign in to your Apple Account.
3. Select the device that you want to remove from iCloud.
4. Click Remove This Device.

Start a support request

If you need help removing Activation Lock and have proof of purchase documentation, you can start an Activation Lock support request.

Thanks again for reaching out. 👍🏼

Good Luck! 👋🏼😉

Smiliñ 😎 Brian | Community Volunteer

Did you buy a used iPhone 7?