AT&T sent a text message to its customers today acknowledging that a subset of iPhone 18 Pro Max devices on its network are encountering cellular problems. The carrier’s alert advises owners to install Apple’s iOS 27.0.1 software update without delay, even as a growing number of users report that the patch does not resolve the issue.
AT&T’s advisory and recommended update
The message, which reads, “Hi, it’s AT&T. Action needed: An important Apple software update for your iPhone 18 Pro Max is available. Some phones may be unable to complete calls/text/data, including to 911. Update to iOS 27.0.1 immediately — Settings > General > Software Update. Please contact AT&T or Apple if you have questions,” was dispatched to all affected subscribers. AT&T emphasizes the urgency, noting that the problem could affect emergency calls.
Apple’s release notes for iOS 27.0.1 do not mention a fix for the AT&T cellular issue. Instead, the update is documented to address a Face ID problem on the iPhone 18 Pro models, leaving the network‑related symptoms unaddressed in official communications.
Scope of the problem and user reports
Discussion threads on the Apple Support Community, Reddit and MacRumors forums indicate that at least several thousand iPhone 18 Pro Max owners have experienced the defect. Users describe an inability to place phone calls, send text messages or use mobile data on AT&T’s network. The failure can be persistent or intermittent, and devices often switch to SOS mode when the network connection drops.
Despite AT&T’s recommendation, many affected customers have indicated that installing iOS 27.0.1 does not restore normal service. The carrier’s advisory acknowledges the lack of a confirmed cause and notes that Apple has not issued a public statement on the matter.
Potential causes and next steps
The United States‑specific version of the iPhone 18 Pro Max is the only new iPhone released last month equipped with a Qualcomm cellular modem. Competing models—including the smaller iPhone 18 Pro, the iPhone Duo, and the iPhone 18 Pro Max sold outside the U.S.—use Apple’s C2 modem. While the difference in modem hardware is highlighted, AT&T and Apple have not confirmed whether it contributes to the observed failures.
If the issue proves to be software‑related, a subsequent update such as iOS 27.0.2 may be required to correct the problem. Conversely, a hardware defect would represent a more extensive challenge for both manufacturers and carriers. AT&T pledged to issue further updates as new information becomes available.
The situation carries a note of irony, as the carrier’s warning about possible text‑messaging failures arrives via a text message itself. Users are encouraged to contact AT&T or Apple for additional assistance while monitoring official channels for future updates.
Mitchell Landsberg is a Senior Technology Correspondent at News Raise. He covers consumer electronics, artificial intelligence, software developments, and digital privacy trends.
