I also try to connect with the itune , and use the apple ID already, but the phone show me that could not activate iphone because the activation server is temporarily unavailable. My version number of the phone is 11.3.
Hello vanle2425672.
Welcome to Apple Support Communities.
If I'm understanding correctly, you are having some trouble with activating your iPhone. I will be glad to assist.
Check out the steps in the following article to see if it helps: If you can‘t activate your iPhone
Cheers.
How can I activation lock for iphoneX?.
