After replacing my iPhone 5 with LG G2 some people could not send SMS using iMessage from their iPhones to my new LG G2, because their iPhones keep trying to send through iMessage even though I turned it off before replacing my iPhone. The only way to send SMS was to turn off the iMessage on senders’ iPhones. Here is the fix that I found on Apple Support:

1. Go to

2. Log in with your Apple ID

3. Click “Edit Products”

4. Find your phone and click “X” to the right of the product

5. Click “Unregister”

Then go to

Click on “Reset my password” and follow instructions.