Production of the iPhone X seemingly isn’t up to Apple’s standards, so the company is sending someone to investigate. According to Nikkei, Apple COO Jeff Williams will travel to China and meet with Foxconn chairman, Terry Gou, to discuss the production challenges facing the iPhone X—something that could potentially make the device very difficult to find when it launches on November 3.

Nikkei’s report comes on the heels of several rumors that claim manufacturing partners have found it difficult to produce the iPhone X’s complex TrueDepth camera. While production has allegedly been slower than Apple’s liking, a recent report says about 2-3 million iPhone X units will be available at launch, with up to 30 million units expected during the fourth quarter.

Executives close to the iPhone X’s production say the outlook has “improved gradually,” though there is still a “fever.” In other words, while manufacturers have been able to produce the iPhone X’s TrueDepth camera with increased success, the technology is still holding up production—enough for Apple to visit these factories to see what’s going on.

Production of the iPhone X apparently won’t reach a satisfactory level until the end of October, though these units may not be ready in time for the device’s release. Instead, consumers can likely expect limited supply of the iPhone X at launch, with a steady stream of units hitting stores shortly thereafter.

Apple will be relying on the iPhone X as its flagship product this holiday season, as reports claim production for the iPhone 8 will be halved due to iPhone X demand. If the company can’t produce enough units, however, you can bet there will be a lot of unhappy customers.

The iPhone X will go up for preorder on October 27, with a launch date set for November 3.