ZDNET’s key takeaways
- An issue affecting iPhone 18 Pro Max users on AT&T.
- The problem is turning off mobile connectivity.
- AT&T has issued an update, but it doesn’t fix things for everyone.
If you’re having problems with your iPhone 18 Pro Max on the AT&T network, you’re not alone. Since the debut of the iPhone 18 series last week, users with the top-tier model have encountered problems connecting to AT&T’s network for calls, texts, data and even 911 communications.
Also: 7 iOS 27 Features That Will Make Old iPhones Exciting Again (No Apple Intelligence Required)
Posts on Reddit and other support forums detail phones randomly dropping into SOS mode in frustrating efforts to communicate. Wi-Fi connectivity works just fine. So what’s going on, and how can you fix it?
How to fix the AT&T issue on iPhone 18 Pro Max
AT&T has not explained what is causing the problem. The problems only affect the iPhone 18 Pro Max and not all other models (not even other iPhone 18 models), so it is likely tied to the model’s Qualcomm modem (the other iPhone 18 models use the Apple C2 modem).
AT&T sent an SMS to customers that read: “Hi, it’s AT&T. Action required: An important Apple software update for your iPhone 18 Pro Max is available. Some phones may not be able to block calls/text/data, including 911. Update to iOS 27.0.1 immediately – Settings > General > Software Update. Please contact AT&T if you have any questions.
As well: iOS 27.0.1 released: Apple fixes annoying iPhone 18 Pro restart and freezing issues
The iOS 27.0.1 software update fixes a freezing issue, a Face ID glitch, and several smaller issues, but its description doesn’t mention AT&T, the phone modem, or even any network issues. Still, if you’re having problems with AT&T connectivity, applying this update should be your first step.
Doesn’t seem to work for everyone
While users say that applying the iOS 27.0.1 update works in some cases, it doesn’t fix the problem for everyone, according to Reddit posts.
Also: 5 hidden iOS 27 upgrades that make a big difference — and why I love them
When I contacted AT&T, a representative told me, “Apple has released a software update to address an issue that may affect calls, data, texts and 911 calls on a small number of Apple iPhone 18 Pro Max phones. AT&T customers with an iPhone 18 Pro Max should now update their phones to the latest available software.
The statement added that customers who continue to experience problems can return to Apple or an AT&T store for extra support.