Iphone 18 Pro Max in U.S. Features Qualcomm's X80 Modem

WHO:

AppleInsider - Apple is the manufacturer of the iPhone 18 Pro Max.

MacRumors - TechInsights conducted the teardown of the iPhone 18 Pro Max.

WHAT:

AppleInsider - The U.S. version of the iPhone 18 Pro Max uses a Qualcomm Snapdragon SDX80M 5G modem instead of Apple's C2 chip.

MacRumors - The U.S. version of the iPhone 18 Pro Max is unique in using the Qualcomm Snapdragon X80 modem, while the iPhone 18 Pro and iPhone Duo use Apple's C2 modem worldwide.

MacRumors - The iPhone 17 Pro and iPhone 17 Pro Max models have the same Snapdragon X80 modem worldwide.

WHERE:

AppleInsider - The iPhone 18 Pro Max's modem configuration is specific to the United States.

MacRumors - The iPhone 18 Pro Max uses the C2 modem in every other country except the U.S.

WHY:

AppleInsider - The use of a Qualcomm modem in the U.S. version may indicate regional differences or multiple modem configurations within the iPhone 18 lineup.

MacRumors - Apple has not explained why only the U.S. version of the iPhone 18 Pro Max has a Qualcomm modem, but it may relate to compliance with a 2023 agreement with Qualcomm.

HOW:

AppleInsider - The teardown revealed the internal components of the iPhone 18 Pro Max, including the A20 Pro chip and the N1 wireless module.

MacRumors - The U.S. version of the iPhone 18 Pro Max includes a newly-identified mmWave 5G antenna module from Apple.

(UPDATED September 19, 2026 18:56 UTC)

Apple has officially launched the iPhone 18 Pro Max, which features a unique modem configuration for the U.S. market, using a Qualcomm Snapdragon SDX80M 5G modem instead of Apple's C2 chip found in other countries. A recent teardown revealed the internal components of the device, including the A20 Pro chip and a newly-identified mmWave 5G antenna module from Apple. While the reason for this regional difference remains unclear, it may be linked to a 2023 agreement with Qualcomm, as the iPhone 18 Pro and iPhone Duo models utilize Apple's C2 modem globally.