I can use imess because it aways write waiting for activation

If you can’t turn on or sign in to iMessage or FaceTime - Apple Support

Akhsan Said:

"I can use imess because it aways write waiting for activation"

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To Use Messages:

Cellular needs to be enables for many, to use iMessages. So, get this activated, and then enable Cellular in Settings.

About Activating an iPhone:

1. Go Here: If you can't Activate your iPhone - Apple Support
2. As it Reads: If your iPhone can't be activated or an alert says the activation server is unavailable or the SIM card is unsupported, learn what to do.