Apple offers free replacements for iPhone 18 Pro Max AT&T cellular issue

Apple is offering free hardware replacements for certain iPhone 18 Pro Max smartphones on the AT&T network after affected devices lost cellular connectivity and became stuck in SOS mode. ZDNet AI, Bloomberg, and Forbes all reported that the issue leaves users unable to make calls, send text messages, or access mobile data. [1][2][3]

The cellular failures began several weeks ago when iPhone 18 Pro Max owners on AT&T started reporting network drops. ZDNet AI and GSMArena both reported that AT&T originally urged customers to install the iOS 27.0.1 software update immediately to avoid losing access to emergency services such as 911. [1][4]

ZDNet AI and GSMArena confirmed that software updates, including iOS 27.0.1, are insufficient to restore service once a device enters the failure state. ZDNet AI reported that while two recent software updates can prevent the cellular bug from occurring on functional units, devices already affected require full hardware replacements. [1][4]

The iPhone 18 Pro Max was announced alongside the iPhone 18 Pro and iPhone Duo at Apple Park on September 9, 2026, and officially released on September 18, 2026. Neither Apple nor AT&T has publicly detailed the precise root cause of the hardware-level failure. [1][7]