press and hold the SHIFT key and the key with ' and @. For you further information there is a web page available with key-board short-cuts you might be interested in - GOOGLE it!
By Paul Roberts on 20 July 2014
wifi connects to the internet via your home router .3g connects to a mobile network rather like your mobile phone which means you will be able to use it outside your home the 3g version is dearer but you have the option of connecting either way
By col on 05 December 2013