TechInsights opened a U.S. iPhone 18 Pro Max (A3473) and found Qualcomm's Snapdragon X80 modem — the same generation used in last year's Pro phones — not Apple's new C2. Apple lists C2 on the 18 Pro worldwide and on Pro Max units sold outside the United States; the U.S. specs page simply omits the modem line. The split is now a confirmed post-launch fact, not a rumor. Watch whether mmWave support or carrier certification is the reason Apple kept Qualcomm only on the biggest U.S. model.