How to unlock Apple ID of my iPhone

The "owner" according to Apple is the person who is signed in, unless you can prove otherwise using criteria that Apple sets. Read this article about how to remove Activation Lock --> How to remove Activation Lock - Apple Support Unless you have the account information that set the lock, or can get the person to remove it, or the original receipt from Apple, or can demonstrate legal inheritance from a deceased owner, you cannot remove the lock; recycle the device.

From the very bottom of Apple Trade In - Apple :

"Does Apple offer recycling?

Yes. Apple Trade In lets you recycle any Apple device (including devices from Apple-owned brands) at any Apple Store and on Apple for free. That includes your batteries and old electronic products as well as free, on-demand packaging recycling for our commercial, education, and institutional customers. When we receive your device, it will be thoroughly inspected to determine if components can be recycled or reused. Whether recycled or reused, all activities relating to the processing of your device will be managed in an environmentally responsible way."

meharban112 wrote:

I am original owner of Iphone 14

my phone was not locked and i was out of country. Some one entered his apple ID.

i cant do any thing to this phone now. I went to apple store they asked me send proof of purchase. Who will tell me the date of purchase? On tmobile purchase there is no IMEI written? If i send my ID to apple, wont be sufficient to unlock apple ID?

One account for everything Apple - verify what devices are associated with your ID.

https://appleid.apple.com/

Get a verification code and sign in with two-factor authentication

Get a verification code and sign in with two-factor authentication - Apple Support

If you still can't sign in

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

If you purchased from Apple, you can request a receipt from the retail location.

Check your email for a copy of the receipt. Here’s how to locate the Apple Store and their contact information: Apple Store - Find a Store - Apple Apple Store - Find a Store - Apple

If your purchase was made at the Apple Online Store, please view the section titled “View or Print Invoice” here: Viewing & Changing Orders - Shopping Help - Apple Viewing & Changing Orders - Shopping Help - Apple

If your mac was purchased from an Apple Authorized Reseller, it is recommend contacting them directly for a receipt.

Keep your receipt after you buy an Apple device

Keep your receipt after you buy an Apple device - Apple Support

You need your original purchase receipt, with the serial number of the phone clearly noted on it. Without that, Apple is most likely not going to help you. How does someone just enter their Apple ID on your iPhone? Do you not know who did this? They would be the best resource to ask what their ID and Passwords are.