Hello, I bought an iPhone 6 in exchange for the lost one, I entered iCloud, but I need to re-enter to update the Apple ID settings. I enter the passwords, and then the device requires confirmation from another device, which I no longer have. In the management of Apple ID from the computer (windows) deleted the former device, but nothing has changed. What to do?
iPhone 6, iOS 12
You need another trusted device or telephone number.
See Two-factor authentication for Apple ID - Apple Support:
A trusted device is an iPhone, iPad, or iPod touch with iOS 9 and later, or a Mac with OS X El Capitan and later that you've already signed in to using two-factor authentication.
Get a verification code and sign in with two-factor authentication - Apple Support
Change Trusted Device list for your Apple ID on Mac - Apple Support
4 Ways to Change the Trusted Number for Your Apple ID on iPhone or iPad
IPhone Verification Problem
