BUT, what that ALSO means is that it ALSO BLOCKS ALL INCOMING INTERNATIONAL calls!!!
To unblock it - the person who's name is ON the phone MUST ONLY THEM go TO ICE with their cedula or ORIGINAL passport (NO copies) or if it's in the name of a corporation, the CURRENT (within less than 30 days) Jersonaria Juridica to change that (I have heard of 1 person that did it by fax). If that phone's been handed down for generations as they often are - & the person has died - I was told by a friend at ICE that it's a VERY DIFFICULT thing to change which often involves going to court to change it (I asked as it happened to me with my old house I rented). Ahhhh - life in "Paradise"!!!
Best thing to do - get SKYPE or something equivalent!!! I have Skype, a monthly plan that gives me unlimited free calls to the U.S. (& Canada for the one I'm on) PLUS I have a U.S. # that was just $60 a year to get & I could pick the area!! The cool thing is when I go to the states, I can forward that phone to my cell so no one knows the difference & since I get free calls - there's no extra forwarding fee!!!