Unable to activation iphone 7
Your iPhone could not be activated because the activation server cannot be reached
Question marked as
See this Apple article: If you can't activate your iPhone
If you can't activate your iPhone or iPad (Wi-Fi + Cellular) - Apple Support
If your iPhone can't be activated or an alert says the activation server is unavailable or the SIM card is unsupported,
See these Apple articles below:
How to unlock your iPhone for use with a different carrier
👉 How to unlock your iPhone for use with a different carrier - Apple Support
Apple can't unlock your iPhone for use with a different carrier. Only your carrier can unlock your iPhone.
You need to contact your Carrier.
Manually update your carrier settings on your iPhone or iPad
Manually update your carrier settings on your iPhone or iPad - Apple Support
Update your network provider settings manually on your iPhone or iPad
Update your network provider settings manually on your iPhone or iPad – Apple Support (UK)