Currently Being ModeratedOct 16, 2011 8:27 AM (in response to g1r2e3g)
I have pretty much the same issue as you - but a slight variation therein.
I am hoping that the simple answer will be that you can access the list of numbers associated with iMessage through your AppleID, via iTunes or however, and deselect numbers. If that functionality isn't available yet - I hope it will be at some point in the future.
Currently Being ModeratedOct 20, 2011 4:26 PM (in response to NickL-UK)
Agreed Nick. Would seem wise that there be some option to choose the transport method per contact, but there definintel is'nt at this stage. Until then the best fix I have found is to buy a cheap pre-paid sim card to reactive the iPhone so the iMessage account will be attached to a differnet number.
Currently Being ModeratedDec 18, 2011 7:47 PM (in response to g1r2e3g)
I had the same problem. This is what I did and it took about 10 mins to take affect. I removed the Sim card from the iPhone 3GS and put it in the Android phone. A texted a few times and it automatically removed the iMessage from my phone and started send regular text messages. However, remember to turn off iMessage on the iPhone ur not using anymore. Hope this helps!
Currently Being ModeratedJan 3, 2012 4:34 PM (in response to g1r2e3g)
You can make it send it as a text message. After you type the message and hit send, tap and hold on the blue message. Two options will pop up: copy and send as text message. I just figured this out myself.
Currently Being ModeratedDec 29, 2012 9:43 AM (in response to socceryo3)
This doesnt work for me, only option is to copy. Having issue where my sister had iphone and switched to droid. Now I cannot send her anything all show up as imessage. Weird thing is they show as delivered.