Devices on my account
Account is hacking
how to delete every device except this device and secure Apple ID
iPhone 6s
Question marked as
Change your Apple ID password first: click here ➡️ Change your Apple ID password - Apple Support
Then remove devices you don't recognize from your account: click here ➡️ Check your Apple ID device list to find where you're signed in (and remove unwanted devices) - Apple Support
Scroll down to the "Remove a Device from the list section".