Based on your request for a camera with audio that can connect to a cellphone, I would recommend either the Disney Cars USB Web Camera or Disney Princess USB Web Camera. Both are available for around R130 and include a built-in microphone so you can record video with sound. They simply connect to your phone via the USB port to allow video chatting or recording videos straight to your phone. They seem like great simple, affordable options that will allow you to capture audio and video on the go with your cellphone. Let me know if you need any other recommendations!