Also worth noting is that they have a €6 per week plan for calling other Orange phones and
landlines for free. This is somewhat unique in Spain. Also, unlike other operators, they do not charge you a connection fee for these calls. It can be very useful for calling the access number of Betamax for example.
However, it's actually only on weekends where you can make as many calls as you want at any time. During the week, you are restricted to off peak times only (18:00-08:00) and also limited to only 100 mins total. Outside these times, you pay 18c/min and a 15c connection fee.
More details here:
http://www.bic-phone.es/docs/Tarifas%20de%20Prepago.pdf