SMS Text Messaging
I have an iPhone 8 (IOS 12.3.1) but SMS Text Messaging isn't working (iMessage DOES work, as do all other functions and services, as far as I can tell). Neither:
**5005*7672*120631****#
nor
*# 5005***#
provide any meaningful response "Error performing request. Unknown Error". Please advise ... any help gratefully received.
Thank you; kind regards,
Steve.
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iPhone 8, iOS 12