In a statement shared with MacRumors today, AT&T said it is "working with Apple" to resolve iPhone 18 Pro Max cellular issues. "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," an AT&T spokesperson said. "AT&T customers with an iPhone 18 Pro Max should update their phones now to the latest available software.