Apple and Motorola are expected to team up with US mobile phone operator Cingular next week to introduce an iTunes mobile that can store and play digital music.

The companies are likely to announce the long-awaited device on 7 September, according to telecoms analyst Roger Entner of Ovum, as well as published reports. Apple has said it will make a major product announcement at an event in San Francisco that day. Representatives of Apple, Motorola and Cingular all declined to comment.

The phone is most likely to have storage capacity similar to the iPod Shuffle, which is available with as much as 1GB of flash memory, and use an online music service co-branded by both Apple and Cingular, according to Entner. That service will probably offer all the music available today on Apple's iTunes Music Store.

The New York Times and The Wall Street Journal reported yesterday that users will be able to download songs onto the phone from the iTunes music collections on their PCs. It was not clear whether they would be able to download songs over the mobile phone network, according to the Times.

The Journal also reported yesterday that Apple may introduce a new line of single-purpose portable music players to replace the iPod Mini. They would have flash memory and be slimmer than the iPod Mini, the paper said.

Motorola announced last year that it would develop an iTunes phone with Apple. Motorola spokeswoman Jennifer Weyrauch yesterday reiterated plans to introduce the device in the third quarter of this year. The companies had originally said it would come out in the first half of 2005.