Check these things first
- If an error says, "No SIM" or "Invalid SIM," learn what to do.
- If asked to sign in with an Apple ID during activation, learn about Activation Lock.
Still need help? Use the next section.
Follow these steps
- Check the list on the System Status page. If the box by iOS Device Activation isn't green, try to activate your iPhone later.
- If asked to enter your password as you activate your iPhone, enter the password. (A password prompt means that Activation Lock might be enabled in Find My iPhone.)
- Restart your iPhone.
- If you're using a cellular data connection, connect to a reliable Wi-Fi network instead.
If you still can't activate, here's how to activate your iPhone through iTunes instead:
- Make sure that you have the latest version of macOS or the latest version of iTunes.
- Check that your computer has an Internet connection.
- With the cable that came with your iPhone, connect your iPhone to your computer. Locate your device on your computer.
- Wait while your computer detects and activates your iPhone:
- If you see an alert that shows "Set up as New" or "Restore from Backup," it means your iPhone is activated.
- If you get an error message on your computer that says that the SIM card isn't compatible, contact your carrier.