i phone having iOS10.11 I cannot change my trusted phone number. There was a list of country. The country code I am trying to put is not in the given list. Find my iPhone was on. Now I got e-mail my find my I-phone has been disabled.
Happy to help answer your question about changing your trusted device number.
Please check this help article: Two-factor authentication for Apple ID under the section titled "View and manage your trusted devices".
You can see everywhere two-factor authentication is available by checking this help article: Availability of two-factor authentication for Apple ID in the section titled "Where is two-factor authentication for Apple ID available?".
Thanks again and have a great rest of your day.
How to change the trusted phone number with the phone number from a country that is not available in the list given by the Apple Inc
