Two very different problems behind one message
“iPhone is not activated because the activation server cannot be reached” and “This iPhone is linked to an Apple ID” both stop setup, but they are unrelated problems. The first is a connectivity or Apple-service hiccup that resolves in minutes. The second is Activation Lock, a server-side ownership check that only the Apple ID owner or Apple Support can clear.
Reading the exact wording matters: if the message names an Apple ID or asks you to enter one, you are looking at Activation Lock. If it only mentions the activation server, the device itself is unlocked and the iPhone just cannot talk to Apple.
Quick fixes for the activation-server error
- 1Switch off Wi-Fi and use a different network, or the other way around — carrier IPs and captive portals are common culprits.
- 2Reboot the iPhone and the router, then retry the activation step.
- 3Check that the device date and time are correct, or set them to automatic — a skewed clock breaks the activation handshake.
- 4Restore the iPhone with Finder (macOS) or Apple Devices / iTunes (Windows) to force a clean activation attempt.
- 5Wait 15–30 minutes if apple.com/support/systemstatus shows an Apple activation-service incident, then retry.
If the device is Activation Locked
When setup asks for a specific Apple ID, the iPhone is tied to that account server-side and re-verifies it on every activation. There is no software bypass for a device you do not own, and FRPB does not offer one. The only legitimate routes are to recover the owning Apple ID or to ask Apple to clear the lock against proof of purchase.
- 1Try to recover the owning Apple ID at iforgot.apple.com — Activation Lock clears the moment the owner signs in.
- 2Gather the original proof of purchase (receipt, invoice or carrier contract).
- 3Submit an Activation Lock removal request at apple.com/support or at any Apple Store or Authorised Service Provider.
- 4Wait for Apple to verify the purchase and clear the lock server-side, then activate with your own Apple ID.
When the message is not fixable at home
If a device you bought second-hand asks for someone else's Apple ID, treat it as a red flag and stop. Ask the seller to remove the iPhone from their account and sign out of iCloud before you pay — a legitimate seller can always do this in front of you.
FRPB publishes these iPhone guides to answer very high-volume searches honestly. We do not claim an iCloud or Activation Lock bypass for hardware you do not own, because no legitimate tool can clear an ownership check that Apple performs on its own servers.