Feb 21, 2019 - We are seeing a problem for the last few months where local / US numbers are appearing as international incoming numbers. The issue seems to appear only on our T-Mobile iPhones. The other family iPhones / my colleague iPhones with different carriers using the same current 12.1.4 iOS don't have this issue. It does not seem to make a difference if the incoming caller in my contacts or not, nor does it make a difference if they are in my contacts and their number has +1 at the front or not .... most of my incoming calls from local US numbers and/or in my contacts are all appearing as international inbound calls. For example I live in 610 area code and calls are coming in as +61 Australia.
Any one having this problem? Any suggestions? Can T-Mobile comment?
Best answer by tmo_mike_c
After everything you've described, I think the ticket is the best bet. You could try removing/readding the existing contacts this happens with but I understand this wouldn't account for the numbers that aren't saved in your list. We'd need our engineers to continue to investigate this further after looking over your tickets.