Is Your iPhone 18 Pro Max Affected? Apple Offers Free Replacements

Apple has confirmed a cellular connectivity issue affecting a small number of iPhone 18 Pro Max devices on the AT&T network in the United States. Some affected phones can lose cellular service and become unable to make calls, send texts or use mobile data.

Apple has released iOS 27.0.1 and an AT&T carrier settings update to help prevent additional devices from being affected. However, if an iPhone 18 Pro Max has already lost cellular service because of this issue, Apple says that a software update cannot restore it and the device will require a hardware replacement.

If you own an iPhone 18 Pro Max, here is what you need to know.

What Is the iPhone 18 Pro Max Cellular Issue?

The reported problem affects a small number of iPhone 18 Pro Max users on AT&T in the US.

Affected devices can lose their connection to the cellular network. Users may see SOS or another indication that the phone is no longer connected to its normal mobile network.

This can prevent the affected iPhone from:

• Making or receiving normal phone calls
• Sending or receiving text messages
• Using mobile data
• Maintaining a normal AT&T cellular connection

Does Apple Offer a Free iPhone 18 Pro Max Replacement?

Yes, for devices that have already been affected by this specific cellular problem.

Apple has confirmed that an iPhone 18 Pro Max that has already lost cellular service because of the AT&T issue cannot have its service restored through a software update. Instead, the device needs to be replaced. Apple has directed affected customers to contact Apple Support or AT&T, or visit an Apple or AT&T retail location.

This is important because the issue should not be interpreted as a general replacement programme for every iPhone 18 Pro Max.

The current information specifically relates to a small number of affected iPhone 18 Pro Max devices using AT&T in the United States.

9to5Mac's report on Apple's confirmation also provides further information about the replacement requirement and Apple's software response.

How Do You Know If Your iPhone 18 Pro Max Is Affected?

One of the most noticeable signs is that your iPhone shows SOS instead of its normal cellular connection.

You may also find that your iPhone:

• Suddenly loses mobile service
• Cannot make or receive normal calls
• Cannot send or receive text messages
• Cannot use mobile data
• Continues to work normally over Wi-Fi but not through the cellular network

What Should iPhone 18 Pro Max Owners Do?

If you own an iPhone 18 Pro Max, Apple strongly recommends installing the latest available software.

Apple released iOS 27.0.1 to help prevent the cellular issue from affecting additional devices. AT&T has also issued a carrier settings update for affected iPhone 18 Pro Max users.

To check for an iOS update:

• Settings → General → Software Update
• You should also check whether a carrier settings update is available: Settings → General → About

What If Your iPhone Has Already Lost Service?

If your iPhone 18 Pro Max has already lost cellular service because of this particular issue, installing the update may not restore the connection.

Apple says affected devices cannot be reactivated through software and require a hardware replacement. Customers should contact Apple Support or AT&T or visit an Apple or AT&T store.

Does This Affect Every iPhone 18 Pro Max?

No.

Apple has described the problem as affecting a small number of iPhone 18 Pro Max devices on AT&T. It does not mean that every iPhone 18 Pro Max is defective.

Apple has also said that it has only observed this particular problem on the AT&T network. Other carriers and other iPhone models are not currently known to be affected by the same issue.

This distinction is important because reports about the issue can make it sound like every iPhone 18 Pro Max owner needs to replace their phone. That is not what Apple has confirmed.

Does the iPhone 18 Pro Have the Same Problem?

There is currently no indication that the iPhone 18 Pro has the same AT&T cellular issue.

Apple's confirmation specifically identifies a small number of iPhone 18 Pro Max devices on AT&T. The iPhone 18 Pro uses different cellular hardware from the US iPhone 18 Pro Max, although Apple has not confirmed that hardware differences are responsible for the issue.

It is therefore better not to assume that the iPhone 18 Pro or other iPhone models are affected by the same problem.

What About iPhone 18 Pro Max Models in the UK?

UK owners should not assume that their iPhone 18 Pro Max is affected simply because of the current reports.

The confirmed issue relates specifically to AT&T customers in the United States. If you are using an iPhone 18 Pro Max in the UK and experiencing SOS, No Service or unreliable cellular connectivity, there could be another explanation.

Your first steps should be to check your network provider, make sure your account and SIM or eSIM are working correctly, and install the latest iOS and network provider updates.

Apple's UK support information for SOS and No Service provides additional troubleshooting steps.

If the problem continues after checking your network and software, Apple Support or your network provider can investigate whether the device requires service.

Should You Contact Apple or a Phone Repair Shop?

For this particular AT&T connectivity problem, Apple or AT&T should be your first point of contact.

This is because Apple has specifically stated that affected devices require replacement rather than a conventional repair. Attempting an unrelated repair is therefore unlikely to resolve this particular issue.

However, not every iPhone 18 Pro Max problem is related to this cellular issue.

If your iPhone has a cracked screen, damaged charging port, battery problem, camera fault or another physical fault, a professional diagnosis can help identify the appropriate repair.

At JD Phones, we can assess supported iPhone faults and help identify whether a device requires repair or whether further manufacturer or network-provider support may be more appropriate.

Protect Your Data Before a Replacement

If Apple or AT&T confirms that your iPhone requires replacement, make sure your important information is backed up first.

If the phone is still usable over Wi-Fi, back up important information such as:

• Photos and videos
• Contacts
• Messages
• WhatsApp data
• Important documents
• Other information stored on the device

The Bottom Line

Apple has confirmed a cellular connectivity issue affecting a small number of iPhone 18 Pro Max devices on AT&T in the United States.

For devices that have already lost cellular service because of the issue, Apple says that a software update cannot restore the connection and the device requires a hardware replacement. Apple and AT&T are directing affected customers towards support and replacement options.

For iPhone 18 Pro Max owners who have not experienced the problem, Apple recommends installing iOS 27.0.1 and the latest carrier settings update to help prevent the issue.

The situation may develop further as Apple and AT&T investigate the problem. If you are experiencing SOS or No Service on your iPhone, do not automatically assume that your device is affected by this specific issue. Check your network, software and carrier settings first, then contact your network provider or Apple if the problem continues.

If your iPhone has a different fault, such as screen damage, battery failure, charging problems or camera issues, professional diagnosis can help determine the appropriate repair route.