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Q: iPhone Messages app incorrectly reports that messages are not being delivered

I send text messages with the Messages app on my iPhone.  I have never had a problem until recently.

 

Recently, all of my text messages are tagged with a red error message "Not Delivered".  But the recipient is in fact receiving these messages.

 

I would like a solution to this problem (if you have one).

 

Here are some extra details:

*  I recently made two changes to my iPhone 6, and I wonder if they are related to my problem:

    1.  Upgrade to iOS 9.3.5

    2.  Changed my cell number

* I have T-mobile and I have "wifi calling" enabled.  I typically connect using "wifi calling".

iPhone 6s, iOS 9.3.5, Model MGC52LL/A

Posted on Sep 6, 2016 1:18 PM

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Q: iPhone Messages app incorrectly reports that messages are not being delivered

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