Apple CEO John Ternus says the company cannot predict when iPhone Duo supply will catch up with demand, leaving customers without a clear timeline for the end of shortages. The device remains constrained, with reported delivery estimates reaching the end of the year and into January depending on the retailer or carrier.

Speaking to Reuters after Apple’s latest earnings report, Ternus said production was ramping up and the company was working to get the phone to customers as quickly as possible. However, he said Apple was not yet able to forecast when supply and demand would be in balance.

The available information does not clarify whether Apple lacks a reliable estimate or is avoiding a firm promise before it can be confident in the timeline. The report says the company appeared surprised by demand for the iPhone Duo, while resellers using bots to secure stock for resale may also be adding pressure to availability.

With some delivery estimates stretching into January, customers hoping to receive the phone before the end of the year may face a wait. Ordering sooner through a major carrier or retailer could mean receiving it earlier, but Apple has not provided a date for when supply constraints will end.

Sources: Tom's Guide.