Question: Reconfigure telephone numbers in iPhone contacts
My iPhone has suddenly changed American telephone numbers into a French format so 914 205 xxxx becomes 91 420 5xxxx. I cannot get through to anyone unless I edit the numbers by adding +1 at the beginning. Is there any way to convince the iPhone that I live in the United States and therefore 1 is the default country code? It is true that I have a number of foreign telephone contacts too, but the US was always the default until now.
iPhone 6, iOS 11.0.1