TS4268: iOS: Troubleshooting FaceTime and iMessage activationLearn about iOS: Troubleshooting FaceTime and iMessage activation
Currently Being ModeratedMay 26, 2013 9:44 AM (in response to Storms5EBE)
Currently Being ModeratedJun 1, 2013 6:27 PM (in response to Storms5EBE)
Are your carrier package covers when you are overseas?
Which country are you trying to use iMessage? Some countries do not allow iMessages so your iPhone will not give you any response.
Try to unsign and sign in again.
For FaceTime and iMessage chosse to use your email address instead of your mobile number.
Go to Settings>>Message>>Send&Receive and set your email address.
If it is still not working, unsign your Apple ID and select your mobile number ("+" "country code" "mobile number").
Also check in: Settings>>Message if you turned on iMessage before. Here, turn off "Show Subject Field".
Hope it helps