So...my wife has an iPhone 5S, and I have an iPhone 7. I don't know about hers, but mine is running iOS 10.3.1. Since yesterday afternoon, when I send my wife a text, she gets it three times. Three separate messages. And once she even got a gibberish text from me that I didn't even compose. Neither of us has iMessage enabled. We're both on the same plan with the same provider (AT&T). It's only my wife who's getting triplicate messages from me, and she's getting triplicates from nobody else. A power cycle didn't solve the problem. So...what's going on, and how can I fix it???