Good afternoon. I find it very strange that your phone is creating a random sms converstation on it's own. I verified this is not a known issue with the device. Does this only happen when you send a text message to your wife?
Have you tried resetting your phone by simply removing the battery then replacing it back to the phone? If this does not help, try http://vz.to/1c0J69x then test your messaging.
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I have reseated the battery and SIM card.
The issue does not happen when I send messages, only when I start the phone. Could it be related to one or more apps that has access to the SMS service?
Here is how I reproduced the issue last time. It does not happen on every occasion:
1) Open "Messaging"
2) Touch Menu --> Delete threads --> Select all --> Delete
3) Reboot the phone.
4) The phone will start and notify me of an unread message.
5) Open "Messaging"
6) There will be one conversation there with the number 1-234-567-890, but with no messages in it. On one occasion there was also a conversation with my wife, but again with no messages in it.
Thanks for the additional details, shywayman. Are you using a 3rd party message application or the stock messaging app? If you have downloaded an app for messaging, please remove it. Then test to see if the issue is persisting. I look forward to hearing back from you.
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I'm using the stock messaging app. There are no other messaging apps on the phone.
I did a factory reset to fix my notifications problem (https://community.verizonwireless.com/message/1005250) and so far the issue has not come back. I will update you if it does.