My brother updated his iPhone 3GS to iOS 5 when it was released, and then switched to his iPhone 4S. If he sends a message to somebody via iMessage, anyone can still respond, but if a new message is sent to him via iMessage, it only goes to his old phone, which has been disconnected.
Any suggestions?
iPhone 4, iOS 5, 16GB
Having a similar issue see thread/3400093
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iMessages use data instead of voice, turn off WiFi on your old phone.
I managed to fix my problem as per thread/3400093 by removing my email accounts and I also put a brand new empty pre-paid simcard in the iphone with a new number. It probably had more to do with the former than the latter but either way it's fixed, sms now going to Galaxy.
iMessages go to old iPhone only
