We are visiting CR in a few weeks and will not be using out phones due to roaming but we will have our iPad and access to wifi. What is the best way to be able to call back to the states? Is it skype or is there something better? I can use FaceTime and a texting ap for most people but I'd like to be able to call my parents who do not have a smartphone. What is the best option for landline or calls to us cell phones?