This is a block diagram of the new BlueCore 7 chip from CSR, which packs satnav, Bluetooth and FM send/seceive onto a piece of silicon just 3.6mm by 3.2mm. John Halksworth, head of product management, says the extra functionality comes at the same cost as a Bluetooth-only chip, which means it could become more or less standard issue on mobile phones and other portable devices.

He claims the sensitivity of the eGPS system is particularly impressive because of the limited scope for aerials in mobile devices. It has also boosted what he calls the "across body" performance to providing good communication even when link back-pocket device to headphones. Apparently in some earlier models, body attenuation has caused some problems.

BlueCore 7 also uses CSR's proprietary Auristream voice codec but reverts to Bluetooth's CVSD if talking to a non-CSR device.