I have got an x10mini but there are things I am not sure about... 1. I am going on holiday soon so do not want to pay high data roaming charges. how do I turn off 3g so I am just using 2g? can I turn on wifi even with 3g off? 2. How much data on an SD card does one track on spotify take up on offline mode? 3. what is the best offline map app for x10 mini? 4. is there any free voice recorders for x10 mini? I keep wanting to make voice notes but don't know how. If any of these questions could be answered I would be extremely thankful!