How to fix iPhone loses service after iOS 13.3 update, no service error

Software updates are primary aimed at delivering good outcomes to the receiving devices. But the actual results can be the opposite due to several elements. Tackled in this post is one of the common problems faced by many iPhone owners following an iOS update implementation. Read on to find out what to do if your iPhone loses service after iOS 13.3 update.

Why an iPhone loses service after updating iOS?

There are many reasons as to why an iPhone would lose service from an update. Aside from unexpected iOS bug, other factors like poor reception, SIM card issues, network system errors, account problems, and in the worst cases, hardware damage can also be the underlying cause. Hence, these are the main factors that you should consider ruling out when troubleshooting your iPhone that loses service after installing the latest iOS update.

To rule out account-related issues, contact your carrier to verify your account status. Do the same if you suspect that the problem is due to a damaged SIM card. No service errors and other relevant issues tied to a damaged SIM card can only be resolved by getting a new SIM card replacement from your carrier.

Troubleshooting an iPhone that lost service after iOS updating to iOS 13.3

The following procedures are used to eliminate common software-related factors that have been tied to no service error on an iPhone. You can try these methods before escalating the problem to Apple Support.

Before your proceed, make sure that  you are using the phone within your network’s coverage area and that there aren’t any possible signal obstructions like tall buildings and concrete walls.

First solution: Remove then reinsert the SIM card.

Removing and reinserting the SIM card is usually what’s needed if the problem is attributed to a corrupted SIM card system. The same thing goes for no service error that’s due to a dislodged or loose SIM card on the SIM tray.

Before you remove the SIM card, be sure to power off your device. This is highly recommended to avoid damaging the SIM card or your iPhone itself. Then continue with these steps to reinstall the SIM card on your iPhone:

  1. While your iPhone powered off, gently insert the SIM ejector tool into the small hole on the SIM card tray found on the side of your iPhone. If you don’t have the ejector, you can use a small paper clip instead.

  2. Slowly push the ejector tool until the tray ejects.

  3. Remove the SIM card from the tray and check for any possible signs of damage like scratches or dents.

  4. If everything looks good, insert the SIM card back into the tray in the same orientation before your took it out.

  5. Push the SIM tray back into the phone until it locks.

When the SIM tray is locked and secured in place, you can turn the phone back on and see if the service is back.


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Second solution: Toggle Airplane Mode on and off.

Network-related errors including those affecting cellular services can also be rectified by the old trick referred to as the Airplane Mode trick. It works by giving a simultaneous refresh and restart on the phone’s wireless system, eliminating any transpiring errors.

turn on airplane mode iphone ios 13

Here’s how it’s done:

  1. From the Home screen, tap Settings.

  2. Select Airplane Mode.

  3. Toggle the switch next to Airplane Mode to turn on. Doing so simultaneously disables the wireless radios and relevant features of your iPhone.

  4. While Airplane mode is turned on, restart or soft reset your iPhone to dump cache.

  5. After your phone reboots, go back to Settings-> Airplane Mode menu.

  6. Then toggle the Airplane Mode switch to turn the feature OFF again.

Wait for a few seconds until your phone re-establish wireless signals and see if the cellular signals are back.

Third solution: Update carrier settings on your iPhone.

Installing these updates can also help fix network-related issues including those affecting cellular services on your iPhone. Carrier updates are separate updates released by your carrier or service provider. These updates usually contains network system enhancements as well as network fixes.

update carrier settings on iphone ios 13

If your iPhone has no trouble connecting to the internet through Wi-Fi and the connection is stable, follow these steps to check for carrier settings updates available for your iPhone:

  1. From the Home screen, tap Settings.

  2. Select General.

  3. Tap About.

  4. Scroll down to the carrier section to see if there’s a new carrier settings update for your device.

You can also use iTunes to manually update carrier settings on your iPhone. This can be considered an alternative method if your iPhone doesn’t have a stable internet connection. Just follow these steps:

  1. Connect your iPhone to your computer using the original Lightning cable.

  2. Allow your iPhone to sync with iTunes and then select your iPhone when it appears in iTunes.

  3. Go to the Summary section then hold down the Shift key on your keyboard and click the button to Check for Update. Doing so will prompt for an iOS image (*.ipsw) to install.

  4. Edit or change the file type to iPhone/iPad Carrier Configuration File (*.ipcc).

  5. Select the desired folder where you’d like to place the file.

  6. When the process is completed, disconnect your iPhone from the computer and then restart it.

The new carrier settings update will then be implemented after your iPhone reboots.


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Fourth solution: Reset network settings on your iPhone.

Network-related issues can also be addressed by resetting the network settings on the phone. This reset erases all your current network settings and customized options including any associated errors that caused intermittent cellular signal. It doesn’t affect the internal data so there’s no need to create backups.

reset network settings iphone ios 13

Just follow these steps if  you wish to proceed with this reset:

  1. From the Home screen, tap Settings.

  2. Select General.

  3. Scroll down to and tap Reset.

  4. Select the option to Reset network settings.

  5. Enter your passcode if prompted to continue.

  6. Then tap Reset network settings again to confirm that you want to reset your iPhone’s network settings to defaults.

Allow your iPhone to finish resetting the network settings and then restarts when done. After it reboots, all default network configuration and network preferences are restored. This means the need for you to re-enable necessary network features in order to use them again on your phone.

Fifth solution: Factory reset your iPhone.

When dealing with recurring symptoms including those inflicted by an iOS update, performing more advanced solutions like a factory reset is usually needed. The error might be too complex that it required a full system wipe and restore. Just be sure to back up all your important files beforehand because this reset will wipe all data from your iPhone storage.

factory reset iphone ios 13

Once you have secured the back up, follow these steps to factory reset your iPhone through settings:

  1. From the Home screen, tap Settings.

  2. Select General.

  3. Scroll down to and tap Reset.

  4. Select the option to Erase all content and settings.

  5. Enter your passcode if prompted to continue.

  6. Then tap the option to confirm that you want to erase and factory reset your iPhone.

You can also use iTunes to manually erase your iPhone and fresh install the latest software version available through a computer. If you go for this option, you can back up your iPhone data straight to your computer’s drive via iTunes.

Restoring your iPhone in recovery mode or DFU mode can also be deemed among the last options, especially if your iPhone is still losing service even after performing a factory reset. Doing so will allow you to restore your iPhone from a previous iOS backup, especially if the problem is due to an iOS bug that requires a dedicated fix patch.

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