1. Approve iPhone from PC by Turning Off iCloud Keychain
- Discard the window “approve this iPhone” by clicking on the button “Cancel”.
- Visit Settings on your device.
- Click on the tab “Apple ID”.
- Now, you have to switch off your “iCloud keychain”.
- Then start your iPhone device again by switching it off.
- Visit Settings on your device once again.
- Click on the option “Apple ID” and then, “iCloud”.
- Now, switch off the option “iCloud Keychain” again.
- After that, try the window “approve this iPhone”.
2. Approve iPhone from PC by Turning Off Authentication
- Skip the screen “approve this iPhone” by clicking on the option “Cancel.
- Visit Settings on your iPhone and then, your Apple ID.
- Choose the option “Two-Factor Authentication” from the tab “Password & Security“.
- Now, turn off the option “Two-Factor Authentication”.
- Reset the password of your iCloud and iTunes account.
- You will receive an email about the Authentication.
- Now, click on the link to turn it off.
- Now, retry the option “approve this iPhone” via the red flag in the settings of the phone. This will approve your device.
3. Approve iPhone from PC through Verification Code
- Open your iCloud account on your iPhone.
- Visit settings on that device
- Click against the “Apple ID”.
- Now, press the option “Password & Security”.
- Then, click on the button “Get Verification Code”.
- Now, you’ll see a verification code displayed on the screen. Tap on the button “O.K.”.
- Now, go back to your iPhone device. You’ll no longer see the window saying “approve this iPhone”