Unlock iphone 7+

(< iOS 15.2) See this Apple article: If you forgot your iPhone passcode

https://support.apple.com/en-us/HT204306

(iOS 15.2 and newer) How to reset your iPhone, iPad or iPod touch if you've forgotten your passcode

https://support.apple.com/en-gb/HT212951

Passcode lock can be reset, as correctly described above. You can also encounter Activation Lock.

Activation Lock is intended as a theft-deterrent mechanism. A theft deterrent that is easy to bypass would not be much of a deterrent.

Nobody here in the Apple Discussion Forums can help you clear Activation Lock.

To clear an Activation Lock, you will need the password of the associated Apple ID, or the original purchase receipt and a discussion with Apple Support, or similar proof of ownership.

If this device was recently purchased and the seller is still available, contact the seller for remediation or for refund. A remote unlock using iCloud is available to the person with the Apple ID holding the Activation Lock, if that person is still available and is inclined to unlock this device.

Again, only the person with the credentials to the Apple ID holding the lock, or Apple, can clear this lock. For Apple to clear the lock, you will have to provide a receipt with proof of original purchase and with matching serial number or IMEI, legal paperwork from an inheritance, or other similar proof of ownership materials.

For recovering access to your own Apple ID, if you are the holder of the Apple ID associated with the Activation Lock:

If you forgot your Apple ID password - Apple Support

If you forgot your Apple ID - Apple Support

How to use account recovery when you can’t reset your Apple ID password - Apple Support

Contact Apple for help with Apple ID account security - Apple Support

If you are the heir:

How to request access to a deceased family member's Apple accounts - Apple Support

Purchasing devices with Activation Lock is unfortunately far too common. These are scams, and other fraudulent sales. These locked devices will not be useful to you, and are probably best recycled. See the following link for more info:

The All Too Common SAD Reality of Buying a Used iPad/iPhone

If you still know the old Apple ID, see -> If you can't connect or sign in to iCloud

If you can't connect or sign in to iCloud - Apple Support

Check that old Apple ID via your email box, see this Apple article: If you forgot your Apple ID

If you forgot your Apple ID email address or phone number - Apple Support                  

OR see -> Having trouble signing in?

https://iforgot.apple.com/password/verify/appleid

Have you forgotten that old Apple ID password? -> See this Apple article: If you forgot your Apple ID password

If you forgot your Apple ID password - Apple Support

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

You can contact Apple support for help, -> Get Support (apple.com)

You have to show proof of ownership of your product, provide all documentation showing your purchase of the device.

If you do not have additional proof of ownership, contact the reseller. They may be able to provide the original purchase document.

Once Apple receive your proof of ownership, Apple will further review your request and provide an update.

You don't have a SIM card, look for a carrier, take a subscription, postpaid or prepaid.

Meijueong wrote:

How to unlock iPhone 7

Activation Lock is intended as a theft-deterrent mechanism. A theft deterrent that is easy to bypass would not be much of a deterrent.

Nobody here in the Apple Discussion Forums can help you clear Activation Lock.

To clear an Activation Lock, you will need the password of the associated Apple ID, or the original purchase receipt and a discussion with Apple Support, or similar proof of ownership.

If this device was recently purchased and the seller is still available, contact the seller for remediation or for refund. A remote unlock using iCloud is available to the person with the Apple ID holding the Activation Lock, if that person is still available and is inclined to unlock this device.

Again, only the person with the credentials to the Apple ID holding the lock, or Apple, can clear this lock. For Apple to clear the lock, you will have to provide a receipt with proof of original purchase and with matching serial number or IMEI, legal paperwork from an inheritance, or other similar proof of ownership materials.

For recovering access to your own Apple ID, if you are the holder of the Apple ID associated with the Activation Lock:

If you forgot your Apple ID password - Apple Support

If you forgot your Apple ID - Apple Support

How to use account recovery when you can’t reset your Apple ID password - Apple Support

Contact Apple for help with Apple ID account security - Apple Support

If you are the heir:

How to request access to a deceased family member's Apple accounts - Apple Support

Purchasing devices with Activation Lock is unfortunately far too common. These are scams, and other fraudulent sales. These locked devices will not be useful to you, and are probably best recycled. See the following link for more info:

The All Too Common SAD Reality of Buying a Used iPad/iPhone

Meijueong wrote:

How to unlock iPhone

You have a locked device.

You need the assistance of the person with the Apple ID and password holding the lock, or original purchsse paperwork or legal paperwork.

Here is what they need to do:

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

Without the Apple ID and password that is holding the activation lock, or without original purchase receipts with serial number or legal documentation, whatever you have acquired will be forever useless, too.

The seller is likely unavailable, or you would not be asking for help here. You’d have asked them to unlock it, or for a refund.

In short, without the assistance of the current owner—the person holding the lock—you have a worthless device. You here have what is effectively—if not actually—a lost or stolen device.

Scroll up to the previous replies for more info.

How to unlock iPhone

How to unlock iPhone 7