Hi I need an expert advice! xperia mini has setting to enable/disable data traffic. Is this for 3G connection? so my understanding is it does not affect send/receive phone call and text. but ensure your phone does not get download or update etc. I just want to make sure I will only connect internet via Wifi. I read some horror stories of iphone users got huge charges despite of them switching off wi-fi and roaming while abroad. I guessed this happened they did not switch off data traffic. info with plain terms appreciated