11/11/2014
Apple site lets you deactivate iMessage and solve your missing text problem
This is important for people switching from Apple to another platform and allows us to help make the switch easier. and ease that iMessage problem.
If you're still being plagued by missing text messages after leaving iOS for another platform, then the time has come to rejoice. Apple has quietly launched a tool that will let you deregister your phone number from iMessage and solve your texting problem once and for all. The root of this mess comes from Apple routing incoming messages from iPhone users through its iMessage system -- even after you've switched to a different phone. The result has been texts from iPhone users disappearing into the ether. If you forgot to disable iMessage before switching devices, often the only solution was to completely disconnect the device from your Apple account. Now all you have to do is plug your phone number into Apple's deregistration site, and punch in the verification code sent to you.
https://selfsolve.apple.com/deregister-imessage
Learn how to deregister iMessage. Be sure you can keep getting text messages by providing the phone number you want to deregister from iMessage.