Apple's (AAPL.US) main manufacturing partner Foxconn Industrial Internet reported a second consecutive month of single-digit percentage growth in sales, raising concerns that demand for AI infrastructure cannot offset the weakness in iPhone sales. The company's November sales rose 3.5% year-on-year to NT$672.59 billion, compared with 8.6% in October, both below analysts' expected 13% growth trajectory for the quarter, data released on Thursday showed. Foxconn Industrial Internet and other AI hardware suppliers have benefited from large tech companies such as Meta (META.US) and Alphabet (GOOGL.US) spending heavily on servers and data centers since OpenAI launched ChatGPT and sparked the AI fever. However, investors have started to question whether these spending can bring enough returns. Meanwhile, Apple's iPhone sales this year are expected to be lackluster, while its business accounted for more than 50% of Foxconn Industrial Internet's total sales in the past. Foxconn Industrial Internet executives said on the latest earnings call that they expect the sales of cloud business, including AI servers, to be roughly comparable to that of the handset business by 2025.