iOS 11/11.4/11.4.1 : How to fix error “activation server cannot be reached”


Many iPhone users after changing iOS version in their iPhone faces issue while activation of iPhone after the upgrade is complete. The similar issue is reported with iPhone X/7 user with iOS 11. After updated to iOS 11.3/ iOS 11.4.1, through iTunes restoration but still unable to pass through the activation SIM stage. When SIM card is inserted, it shows below errors in iPhone and iTunes

"Your iPhone could not be activated because the activation server cannot be reached. Try connecting your iPhone to iTunes to activate it" - the message pops up in iPhone
"The iPhone could not be activated because the activation information could not be obtained from the device. Disconnect your iPhone, make sure the SIM card is inserted correctly." - the message pops up in iTunes

If you are also facing such issue please try following below steps:  If your iPhone uses a SIM card, make sure that the SIM card is in your iPhone. Even without an active contract, your iPhone might need the SIM card to activate. Make sure that sim card is properly inserted and reinsert the sim card if you continue to see error message.

Fix 1: Wait for sometime

Quite possible that apple server are busy of down due to various reason. This thing specially happens if there is a new iPhone or an update to iOS). Check the status of Apple’s activation server status here at

Fix 2:  Connect to WIFI network instead of Cellular
It is recommended to use only WIFI network during the upgrade process as the cellular data may not be available from within the iPhone.

Fix 3 : Log in with correct applied

It is possible that you are using a new AppleId while upgrading your iPhone which may cause conflict with old Appleid settings available with Apple. So first please try with old AppleID and once iPhone is working fine you can change is later on.

Fix 4: Use iTunes to activate your iPhone
Please update iTunes to latest version available first. And make sureyour computer has an Internet connection.
-Now connect the iPhone to computer via the USB cable. Turn it off and reboot.
-Open iTunes on your computer.
-Wait while iTunes detects and activates your iPhone:
- If iTunes shows, "Set up as New" or "Restore from Backup," it means that iTunes activated your iPhone.
- If an error in iTunes says that the SIM card isn't compatible, contact your network carrier provider.



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