Visa Renewal
No need to fly out of UAE to renew 'on arrival' visas. You can drive to Oman to do it then come straight back. Several companies offering minibus trips if you don't want to drive yourself. Make sure you stay at least 30 days and not more than 39 before making the trip. Less than 30 days counts as a multi-entry and you do NOT get a new visa. More than 39 days collects fairly heavy fines which mount by the day.