Fixing iPhone No Service Issue After iOS 17/18 Update: A Comprehensive Guide

Part 1. Why is My iPhone Saying No Service after Update?

There are a few common reasons you may see a ‘No Service’ or ‘SOS’ message on your iPhone after updating to iOS 17/18.

The most likely causes include:

Airplane Mode is enabled - Check to make sure Airplane Mode is turned off, which disables all wireless connections.

Out of carrier coverage area - If you moved to a new location, you may be outside your carrier's service range until they add coverage.

Misconfigured network settings - Sometimes an iOS update resets settings or changes carrier configurations, causing service issues.

Carrier outage - Your cellular provider could be experiencing a temporary outage or disruption in your area.

Other software bug - An iOS 17/18 bug may also be interfering with cellular connectivity and service.

Part 2. How Do I Fix No Service after Update?

2.1 Force Restart your iPhone

One of the first things to try when dealing with iPhone issues is a force restart. This resets the device and clears any corrupt temporary data that may be causing problems.

Here's how to force restart your iPhone:

• 1. Press and quickly release the Volume Up button.
• 2. Immediately press and quickly release the Volume Down button.
• 3. Now, press and hold the Side button until you see the Apple logo appear on the screen

2.2 Carrier Updates

Another potential fix is to check for and install any pending carrier updates for your iPhone. Cellular providers will periodically release carrier updates that can improve performance and compatibility and fix issues after an iOS update.

To check for a carrier update when your new iPhone saying no service:

• 1. Open the Settings app on your iPhone.
• 2. Tap on General, then About.
• 3. If a carrier update is available, you'll see an option to update your carrier settings. Tap to Update and Install the update.
• 4. Wait for the update to complete. It may involve restarting your iPhone.

2.3 Toggle Airplane Mode

A quick fix you can try is toggling Airplane mode on and off. This essentially turns your wireless connectivity off and then back on, which can resolve any temporary glitches.

To toggle Airplane mode and fix no service after airplane mode iPhone:

• 1. Open Settings and tap on Airplane Mode to enable it. This will turn off all wireless connectivity.
• 2. Wait 30 seconds, then go back and turn Airplane Mode off to re-enable wireless connectivity.
• 3. Check if cell service is restored on your iPhone.

2.4 Remove the SIM card and insert it again

Removing and reinserting the SIM card can force your iPhone to re-register the mobile connection and troubleshoot any issues.

To fix iPhone 15 no service:

• 1. Use the SIM card ejector tool to eject the SIM card tray.
• 2. Remove the SIM card from the tray and reinsert it. Make sure it is seated firmly.
• 3. Slide the SIM card tray back into your iPhone.
• 4. Check for restoration of cell service.

2.5 Reset Network Settings

You can also try resetting all network settings on your iPhone, which will clear any problematic configurations that may have occurred during the iOS update.

To reset network settings:

• 1. Go to Settings > General > Reset.
• 2. Tap on Reset Network Settings.
• 3. Enter your passcode if prompted.
• 4. Confirm reset when asked. Your iPhone will reboot.

2.6 Change DNS Server

Changing the DNS server assigned to your iPhone can also help troubleshoot connectivity issues after an iOS update.

Follow these steps:

• 1. Go to Settings > Wi-Fi and tap on the "i" icon next to the Wi-Fi network you are connected to.
• 2. Tap on DNS.
• 3. Remove any existing DNS server IP addresses.
• 4. Enter a new DNS server such as Google (8.8.8.8) or Cloudflare (1.1.1.1).
• 5. Tap Save in the top right corner.

2.7 Restore iPhone

If none of the above solutions work, you may need to do a full restore of your iPhone to factory settings. This will completely wipe your device and install a clean, updated version of iOS.

To restore your iPhone and fix no signal iOS 17/18:

• 1. Backup your iPhone data to iCloud or iTunes on a computer. A full restore will wipe your device.
• 2. Connect your iPhone to a computer via USB and open iTunes or Finder.
• 3. Select your iPhone and then click Restore. This will install a fresh copy of the latest iOS version.
• 4. Set up your iPhone from scratch after the restore completes. Do not restore a backup yet.
• 5. Test cell service first before restoring your backup. This determines if a clean iOS install resolves the issue.

Part 4. People Also Ask about iOS 17/18 grocery list Not Working

Q1. Will restoring iPhone fix no service?

Yes, restoring your iPhone to factory default settings can often resolve the no-service issue if it started after an iOS update. This wipes the device and reinstalls a clean iOS version, which fixes system errors.

Q2. Will I lose anything if I reset network settings?

Resetting network settings does not delete any personal data or content. It only clears network configurations like Wi-Fi passwords and cellular settings. So, it's safe to try to fix the iPhone with no service without losing anything.