AT&T is facing a growing wave of cellular network complaints from customers using the newly released iPhone 18 Pro Max. Many affected users report that their phone drops calls, fails to send texts, and completely loses data access. In response, AT&T and Apple are advising everyone to install a recent software update. However, early signs show this suggested software fix might not work for everyone just yet.
Users see SOS status as network drops completely
The core problem leaves phones unable to reach the AT&T network at all. Instead of normal signal bars, the status indicator just shows “SOS” at the top of the screen. This means people cannot make normal phone calls or even reach 911 emergency services. It is a serious safety concern for anyone relying on their phone.
Interestingly, this hardware trouble only hits one specific model. The regular iPhone 18 Pro uses a different modem part and seems perfectly fine. The larger iPhone 18 Pro Max uses a Qualcomm modem, and that is where the connectivity drops happen. Not every single user has the problem, but enough do to cause a stir online.
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New system update fails to solve the connection bugs
To handle the complaints, AT&T began sending alert messages suggesting a system update directly to affected phones. The automated text tells users that an important Apple patch is ready to download. It asks them to go into their settings and upgrade to the latest iOS 27 software right away.
The official release notes for iOS 27.0.1 mostly mention fixes for Face ID and the camera. Sadly, people who followed the carrier advice say the patch does not help with cellular signals. Many users went online to share that they updated their phones on Monday and still see the SOS message.
For now, affected buyers are stuck waiting. If you rely on AT&T, you might want to hold off on buying the biggest phone model until a real fix arrives. The two companies will need to release another patch soon to finally close the case.
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