The land telecode of Cuba is 53. There is an almoast nation wide mobile network and possibly with connection to your local provider so don't be surprised your own mobile phone works here. The costs for an international call is on the other hand quite expensive.
In many hotels and some public places you find wifi internet services at 2 CUC per hour.
There are almoast no international newspapers or magazines available. There are a few Cuban state controlled newspapers available. Hotels have international satelite TV news channels. In private homes you have Cuban TV channels and Telesur.