After I updated my CDMA iphone 4 to iOS 6.0 using the wireless the SMS doesn't work, i.e. i can't send new sms, i can only receive the new sms.
reset the network settings(Settings>General>Reset>Reset Network Settings) so your phone will reactivate with the carrier. If that doesn't work contact your carrier to reprovision your messaging
Are you on sprint or verizon?
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