If you want the best call quality on your mobile you need HD Voice
HD Voice gives you crystal clear high definition voice calling without background noise. It’s like talking to someone in the same room, even if the Vodafone Warriors have just scored. HD Voice is also known as Wideband audio.
HD Voice is available on these great mobile deals, and many others
Software updates can be found under: Settings > General > About Device > Software Update
If the handset prompts for update then you should continue. Be aware that data charges apply when using mobile data, so WiFi is recommended.
When the handset prompts 'The latest updates have already been installed' you can start using HD Voice.
The Samsung GALAXY S3 MINI handset needs a hard reset (factory reset) in order for HD Voice to be activated. A hard reset erases customer data and contacts and is not advisable. Please contact us for more information.