My iPhone is not receiving SMS texts from other iPhone users if their iMessage is turned on.
Whenever I'm out of wifi I can't receive SMS text messages from other iPhone users who are sending to me via iMessage even though they have enabled their 'send as MMS/SMS if iMessage is not available'.
I only have a Text and Call Plan (no data) but if the sender has iMessage turned on, and enabled the 'Send as MMS/SMS if iMessage is unavailable', shouldn't my phone automatically receive iMessages as text messages when I am out of wifi?? (I receive all their messages once i have wifi again.)
iPhone 6, iOS 11.4.1