Hello and welcome to Apple Support Communities, Hashem!
I understand you're not able to activate your iPhone because you're being prompted to update your device. I'd be happy to provide information to help you out.
I understand you're not able to activate your iPhone because you're being prompted to update your device. I'd be happy to provide information to help you out.
Use the steps in this article to move forward: If you see a Cellular Update Failed or Apple Pay Not Available alert after iOS update or restart
Thank you for using Apple Support Communities.
Have a great day!