I have read the valuable info on phone calls but still confused. We are heading down to SBH the first week in November and will need to be available by cell phone.. If someone wants to call us, do they dial 011 590 and your area home area code and phone number. or do they dial 011 590 690 and then your area code and phone number. I;m thinking as this is an American phone that we don't need the 690.. Many thanks