Q: imessage waiting for activation

ok, first u have to go setting and choose messages than send and receiv option  touch i symbol delete the id's than sign out ur apple id which means in the

same screen up on the center,,

and relogin same apple id and ur number

if it's not working please rest all settings,

If you get an error when trying to activate iMessage or FaceTime - Apple Support

if you're getting an sms charge that usually indicates that your phone carrier isn't a supported carrier for imessage.

nope, that's only for activation purpose that it, its work for all carriers

NOw ur imessage working or not ?