General improvements to sound output and speaker balancing across all media modes. Bluetooth Connectivity:
In older 2xx versions, the "Phone" button often only functioned as a mute button. Version 0358 activates the on-screen phone menu for calls and contact lists (requires a Bluetooth module). Audio Quality: rns 310 firmware 0358 download
Supports 7-digit postcode lookups (UK) and adds a "Whole Route" map view to the menu. Phone Button Activation: General improvements to sound output and speaker balancing