With certain phone numbers, I can receive SMS texts from my friend's number, and I can call them, and they can call me, but if I try to text them I get a text response from a number in the 216 area code -- "Error invalid number. Please re-send using a valid 10 digit mobile number or valid short code." The same issue in on my wife's phone. I have an iphone 5 and she has a 4. I am baffled. Any suggestions?
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