I'm thinking as well that the new area code is probably the issue. Thanks for the interesting work-around. Believe it or not, by friend does not have a smart phone (he is still using the 14 year old Nokia that I gave him), and doesn't want to use his...
I have been requested to respond as to whether this was resolved. Unfortunately, I cannot answer in the affirmative, so cannot say that there has been a solution. Many thanks though for those who tried to help on this issue.
My friend verified my phone number several times, we reviewed using +1 before the country code which is what I have used all the time using this carrier when calling Canada and the US from Mexico. On initial enquiry with his carrier, he was told that...
Thanks for your response. His number is listed in my Contacts, so that is not the problem. I will forward on your answer to him so he can contact his Mexican carrier. I do know that I have had that carrier in the past, and was able to call Canada.