Apple’s iPhone 14 models contain a Qualcomm chip that can talk to satellites, but have additional custom-designed Apple components used in the phone’s biggest new feature, according to an analysis of the phone by iFixit and an Apple statement.

The phones go on sale in South Africa this week. One of the major new features is the ability to connect to satellites to send emergency messages when there is no Wi-Fi or cellular data connection.

Apple said earlier this month that the iPhone 14 models contain new hardware that makes possible the emergency message service, which Apple plans to turn on with a software update coming in November. Apple did not give details about the satellite-specific hardware.

iFixit, a San Luis Obispo, California-based firm that disassembles iPhones and other consumer electronics to assess how easily they can be repaired, took apart an iPhone 14 Pro Max model on Friday, revealing a Qualcomm X65 modem chip.

The Qualcomm chip provides 5G connectivity for cellular networks but is also capable of using what is called band N53, the frequency band used by satellites from Globalstar.

Globalstar earlier this month announced a deal in which Apple will take up to 85% of Globalstar’s satellite network capacity to enable Apple’s new emergency messaging feature.

In a statement on Saturday, Apple said there is additional proprietary hardware and software in the iPhone 14 for the new messaging feature.

“iPhone 14 includes custom radio frequency components, and new software designed entirely by Apple, that together enable Emergency SOS via satellite on new iPhone 14 models,” Apple said in the statement.