Invalid SIM message
There is an "Invalid SIM" notification on my phone where it would normally show my wi-fi connection. What does this mean?
iPhone 7, iOS 11.2.6
Is your phone locked to another carrier?
How to unlock your iPhone for use with a different carrier - http://support.apple.com/HT201328 - Only some carriers offer the ability to unlock iPhone for use on any carrier. Follow the instructions in this article to unlock your iPhone.
