hi, so i brought a 3G acer netbook for my two girls last week, iv been using the vodafone simcard from my dongle however i found a much cheaper sim only deal on three mobile but whenever i try to put my three sim into the sim slot in the netbook it wont recognise the sim. is it possible to unlock the netbook onto three mobile if i take it to a computer shop or will i just have to buy a three mobile dongle and put the sim into that. thank you.