>"When you move your SIM card from an iOS device to a non-iOS device, there's a period of time during which Apple accepts iMessages for your number, especially

>"When you move your SIM card from an iOS device to a non-iOS device, there's a period of time during which Apple accepts iMessages for your number, especially when you have other devices configured with iMessage." If you turn off iMessage before removing the sim card this won't happen. I do this all the time when switching between my HTC One X and iPhone 4.