iPhone Messages Not Working After iOS 18 Update? Here’s How to Fix It

Did your iPhone stop sending or receiving messages right after you updated to iOS 18? You’re not alone. Many users report messages stuck on “Not Delivered,” group chats failing, or texts that never arrive.

The good news is that this is rarely a permanent hardware issue. It’s typically caused by a minor network glitch, a setting that was reset during the update, or a temporary software bug. This guide will walk you through the most effective troubleshooting steps, from simplest to more advanced, to get your iMessages and SMS working again.

Troubleshooting iPhone Messages Not Sending/Receiving on iOS 18

Follow these steps in order to resolve your messaging issues efficiently.

1. The Quick Fix: Re-send and Check Your Connection

Start with the fastest solutions first.

• Re-send the Message: Tap the red exclamation point (!) next to the failed message and select “Try Again.” This often works for temporary delivery failures.

• Check Your Signal: Look at the signal bars in your status bar. If you see “No Service,” “SOS,” or “Searching,” your iPhone cannot connect to a network. Move to an area with better cellular reception or connect to a stable Wi-Fi network.

• Toggle Airplane Mode: Swipe down from the top-right corner to open the Control Center. Tap the Airplane Mode icon to turn it on (it will turn orange), wait 10 seconds, then tap it again to turn it off. This quickly resets your network connections.

2. Verify Your iMessage and SMS Settings

An iOS update can sometimes reset critical messaging settings.

1. Go to Settings > Messages.

2. Ensure the following toggles are enabled (green):

   • iMessage: This must be on for sending blue-bubble messages between Apple devices.

   • Send as SMS: This allows your iPhone to use a standard text message (green bubble) if iMessage fails or the recipient doesn’t have an Apple device.

   • MMS Messaging: This is required for sending and receiving photos, videos, and group messages.

3. Restart the Messages App and Your iPhone

A simple restart can clear temporary software glitches.

• Close the Messages App: Swipe up from the bottom of the screen (or double-press the Home button on older iPhones) to view the app switcher. Swipe the Messages app window up and off the screen to close it. Then, re-open it.

• Restart Your iPhone: Press and hold the Side button and either Volume button until the power slider appears. Drag the slider to turn off your iPhone. After 30 seconds, press the Side button again to turn it back on.

4. Check for a Carrier or iOS Update

Sometimes, the fix is waiting in a software update.

• Check Your Mobile Plan: Contact your carrier (e.g., AT&T, Verizon, T-Mobile) to confirm your account is in good standing and there are no outages in your area.

• Update iOS: Go to Settings > General > Software Update. If an update is available, tap “Update Now.” Apple frequently releases patches for bugs introduced in previous versions.

5. The Advanced Reset: Network Settings

If you’re still having issues, your network configuration may be corrupted.

1. Go to Settings > General > Transfer or Reset iPhone.

2. Tap “Reset.”

3. Select “Reset Network Settings.”

Note: This will erase all saved Wi-Fi passwords, Bluetooth pairings, and VPN configurations. You will need to re-join your Wi-Fi networks afterward.

Still Not Working? What to Do Next

If you have completed all the steps above and your messages are still not working, the issue may be more specific.

• Contact Your Carrier: There may be an issue with your SIM card or a provisioning error on your account.

• Contact Apple Support: If your carrier confirms everything is fine on their end, the issue could be deeper within the iOS software or, rarely, a hardware problem. Schedule an appointment at an Apple Genius Bar or contact Apple Support online for further diagnostics.

By following this structured guide, you should be able to diagnose and resolve the common causes behind messaging failures on iOS 18 and get back to seamless communication.