My iPhone 6 and apps are up to date (iOS 8.4) but in the last month or so I have been receiving duplicate text messages from some people most of the time, but not always. The duplicate messages come in at the same instant and cause 2 notification alerts. These are real text messages, not iMessages, and I'm using the normal Apple "Messages" app.
This has happened in the past too, but not as frequently as the past month. So I don't suspect it has to do with a recent upgrade to iOS 8.4.
Some duplicate text messages are from AT&T phones, while others are from known Verizon customers.
Any thoughts on how to stop these duplicate text messages?
Thanks, Wade