Oh, I was not confused by the inital post stating it was a bug, users may view it that way, may not be able to find the correct or reliable documentation, etc. I think I was confused by the reports outside the forum about a bug in iMessage since I found the docs in about .023 seconds.
The documentation related to iMessage along with a tech note from Oct 24, 2011 explain how to turn it off. Seems that it is listed there in the additional notes section on what you need to do if you are switching your phone as it relates to iMessage. There are also some details in the setup and documentation about implications, what, iMessage is and any addition considerations when using the service as it relates to your carrier or device.
So that is why I am confused, it is not a bug, you must Turn it off first on your iPhone before transferring your number to device that does not support iMessage. (Seemed strange that an outside tech site published it as a bug, hence why I was confused and concerned.) I am correct in thinking that an Android device would be a device that DOES NOT SUPPORT IMESSAGE. I checked the system requirements for iMessage and it seems Android is in fact not a supported device. So, seems that a user transferring from an iPhone to another device would need to do what is listed in the support document. At that point the device is disconnected and Texting returns to normal SMS/MMS. Many services and devices operate in this manner from my experience. There are many new services that connect to a APP or device. (In fact it is a good practice to review them every month or so.)
This is one of the docs I found from October, 2011- http://support.apple.com/kb/TS2755
Taken from the additional information section...
- If SMS or MMS messages you send are not displayed correctly on other devices, see this article.
- If you receive a message that your mailbox is almost full in the Messages application, ensure that you are using the latest version of iOS. If you continue to receive the prompt, delete some messages. You can delete a conversation by swiping left or right over a conversation and tapping Delete. For other ways to delete a conversation, see the User's Guide.
- If you plan on transferring your SIM card or phone number from an iPhone to a device that does not support iMessage, turn off iMessage in Settings > Messages first. If you do not, other iOS devices may continue to try to send a message using iMessage first, instead only using SMS or MMS.
- If you have recently received or placed a call and cellular data is not available, your iMessage may not send immediately. When prompted, you can choose to send the message as SMS.
I really does not make a difference to me what it is called in the forum. I sometimes get confused by what a user may call it as compared to what a technology reporter may call it. I also understand it is very hard to find the correct answer to an issue, but seems the documentation is here. It took all of .035 seconds for a search engine to find the article and some documentation so that is why I was confused by an published report outside the forum stating it was a bug.
Anyway good to find out the proper way to activate and deactivate iMessage. I only reviewed the pros/cons of iMessage when Apple announced iMessage and wanted to make sure I did not miss something that can be a problem if users change devices. So my confusion was with the outside report, not your initial problem which is ensuring proper deactivation of iMessage and returning to SMS/MMS. I was able to find some documentation which sometimes I agree can be difficult to do.
Best of luck,
Thanks