How to update iPhone carrier settings

Have you accidentally dismissed the notification for mandatory carrier settings updates? Instead of tapping OK, you cleared the alert, and now some connectivity features like hotspot or cellular data aren’t working correctly. Don’t worry. There are a few steps you can take to update carrier settings manually so your iPhone® can connect properly to your carrier’s network.

At Asurion, we’re all about making tech woes a thing of the past. Our experts know how to keep your devices running smoothly. From fixing iPhone cellular data issues to unlocking iPhones for use with any carrier and protecting phones, we help our nearly 300 million customers get the most out of their favorite devices. Here’s our guide on how to update carrier settings on an iPhone.

What are carrier settings?

Carrier settings are small files your mobile network, like Verizon®, AT&T®, or T-Mobile®, provides to help your iPhone connect and work properly on their network. The files contain optimum mobile network configurations for calling, data messaging, network frequencies, and cell towers. These settings control:

• Mobile data
• Hotspot access
• Voicemail setup
• Call settings

Typically, carrier settings install automatically on iPhones, but sometimes you’ll get a pop-up saying “Carrier Settings Updates Available.” If the updates are mandatory, you’ll see an OK button instead of Update. These updates let your carrier optimize network settings to improve cellular connectivity and performance. 

Why update carrier settings

Updating carrier settings on iPhone keeps the device compatible with any changes your carrier makes.

Better connectivity

Carrier updates often include new network parameters that improve how your iPhone communicates with cellular towers. If you’ve been experiencing dropped calls, unusually slow data speeds, or a weak signal in areas where coverage used to be strong, the updates often help. 

Access to new features

Modern carrier networks are evolving, especially with the rollout of features like:

• 5G
• VoLTE (Voice over LTE)
• Wi-Fi® calling
• Enhanced hotspot capabilities

Updates allow your phone to access these new features. Without the latest carrier settings, your iPhone may miss out on improvements already available from your networks.

Bug fixes

Certain connectivity features can act up after a major iOS update. Carrier setting updates patch inconsistencies between your iPhone’s software and your carrier's current configuration to prevent small bugs from turning into everyday annoyances.

Improved compatibility when switching SIMs or carriers

When you switch carriers, insert a new local SIM while traveling, or activate an eSIM, your iPhone might need new carrier settings to properly support the new network. Without an update, features like mobile data or voicemail may not work as you expect.

How to update carrier settings

To manually check for and install carrier settings, proceed as follows:

1. Connect your iPhone to Wi-Fi or a cellular network.
2. Tap Settings > General > About.
3. If an update is available, a pop-up will appear saying Carrier Settings Update Available.
4. Click Update.

What to do if no update is available?

If you didn’t find any carrier settings updates but are still facing connectivity issues, you can try some quick fixes.

Restart your iPhone

A simple restart can reinitialize your connection to the carrier’s network and sometimes trigger pending updates.

Reinsert your SIM card

Reinserting your SIM card can refresh your connection and prompt your iPhone to check your carrier settings updates:

1. Remove your SIM.
2. Wait a few seconds.
3. Then put it back in.

Reset network settings

Sometimes your iPhone doesn’t connect properly to your carrier's network because of configuration issues. Resetting your network settings might help restore default settings and clear out any conflicting data interfering with connectivity.

1. Go to Settings > General > Transfer or Reset iPhone.
2. Select Reset.
3. Tap Reset Network Settings.