So my family leased Galaxy 8+ from Sprint. Now they want to go to Australia for the holidays. This post here, https://xdaforums.com/sprint-galaxy-s8+/help/samsung-s8-s8-sm-g950u-sprint-verizon-t3697602 , says it has to be unlocked. However. that post specifically says Europe. Not sure how other countries are setup. Would the 8+ still need to be unlocked?