One day I tried to reset my iPhone using the “Erase All Content and Settings“, then the nightmare started!
I was taken to the activation screens, and begun with the setup wizard until I chose a Wi-Fi network the process started, and gave me a message that it will take about three minutes to activate iPhone, few minutes later a screen with this message appears: “Your iPhone could not be activated because the activation server is temporarily unavailable.”
After couples of try and fail, I found the below solution and resolved the problem.
- Open iTunes.
- Connect the iPhone
- Press both the home and sleep/wake buttons until the Apple icon appears (ignore the red slider if it shows).
- Continue pressing the home button alone until iTunes sees your phone in recovery mode.
- Follow the prompts to restore the iPhone.
You may be able to recover your data from your last backup, or you can also choose to configure iPhone as a new cell phone.