Can I buy a pre-paid card for my Instinct 2S Solar so that calls can be answered and made? If so, where and how can I do this? Is the watch suitable for a teenager without a mobile phone (if I download the app to my mobile?).

Does anyone know how this works with the Surf Tracker 2 and Connect IQ? Or is it worth buying the Surf edition. I don't necessarily need the tide display but would simply like to track the sessions.

Does the Instinct 2S Solar have a sleep phase alarm clock?