Mobile phone question 
  My boss wants to buy his wife a new phone, but he can only find it offered as a Pay-as-you-go phone. He wants to know if he can use a 'contract' sim card in it?
 
 As far as I understand it, if it's locked to a specific company like Orange, then he would need an Orange sim card, otherwise he just needs to get it unlocked - then he can use any type of sim car in it right?
 
 Any idea how much it costs to get a phone unlocked?
 
 Cheers.