First up is the Sony Ericsson W850i Walkman slider phone (pictured). It's a formidable music phone that comes with a large colour screen, 3G connectivity, FM radio, stereo Bluetooth, expandable Memory Stick Duo Pro slot with a 1GB card included, a 3.5mm jack adaptor and a variety of fun and useful pre-installed applications.

The built-in music player supports AAC, AAC+, E-AAC+, MP3, M4A, WAV and WMA formats, so it should handle all of Sally's music files. It also features a 2-megapixel camera so she can take the odd snapshot and it can support up to 4GB of external memory. It's available for free on a monthly contract or for around £270 SIM-free from eXpansys.

Sony Ericsson has also just launched the W950i Walkman candybar phone, which comes with 4GB of onboard flash memory. It has a large colour touchscreen, 3G connectivity and an FM radio and it supports AAC, AAC+, E-AAC+, MP3, M4A, WAV and WMA formats. It also has a 3.5mm jack adaptor, but it doesn't come with a camera.

While this might put some people off, it's perfect for Sally, who doesn't care about the camera but just wants a good music-playing phone. It's available for free on a monthly contract, depending on which tariff you go with, or for around £445 SIM-free from eXpansys.

Another potential music phone could be the Nokia N91. This is Nokia's high-capacity hard drive-based music phone. It holds 4GB of music. What makes this phone different from the W950i is that it has a built-in Wi-Fi adaptor and a 3.5mm jack. The Wi-Fi adaptor means that Sally would be able to transfer music quickly and wirelessly over a Wi-Fi network from a PC and browse the Internet too.

The 3.5mm jack means she doesn't need to mess around with any adaptors and she can simply plug her headphones straight in. The N91 is available for free on a monthly contract or for around £330 SIM-free from eXpansys.

Other options include the Sony Ericsson W810i, Samsung i300, Motorola V3im or Nokia 3250.