Apple launched the iPhone 18 Pro and the foldable iPhone Duo on September 9, 2026, integrating its internally designed C2 modem for cellular connectivity across 5G networks into both product lines. Both use proprietary cellular chips.
Initial industry projections suggested that the internally developed component would lack mmWave support across the United States and force reliance on Qualcomm parts to serve domestic carriers, a scenario that the official launch has now ruled out.
Official technical documentation released by Apple shows the C2 modem integrated exclusively into the smaller-screen iPhone 18 Pro, leaving the larger iPhone 18 Pro Max dependent on parts supplied by Qualcomm. The manufacturer did not disclose reasons for separating the two devices.
Apple stated that the C2 uses artificial intelligence to stabilize cellular signals, supports American mmWave frequencies, surpasses the data upload speeds of the previous C1X chip, and cuts overall energy consumption by 15%.
United States specifications list compatibility with the n258, n260, and n261 millimeter-wave bands alongside sub-6GHz networks using 4×4 MIMO technology. The British model runs sub-6GHz.
Both handsets also incorporate the Apple-designed N1 wireless chip to control Wi-Fi 7, Bluetooth 6, and Thread protocol connectivity.
The iPhone 18 Pro starts at $1,199 while the iPhone 18 Pro Max begins at $1,299, sold in burgundy, glacier, silver, and black finishes with storage tiers of 256GB, 512GB, 1TB, and 2TB. Preorders open on September 12.
The iPhone Duo sells in star white and night sky for a starting price of $1,999. Storage configurations for the folding handset include 256GB, 512GB, 1TB, and 2TB. Orders commence on October 16 with retail store deliveries scheduled from October 23.
Updated Apple documentation confirms that the iPhone 18 Pro Max omits the C2 modem, restricting the hardware to the other announced handsets.