請問我的SONY XPERLIA LT29i螢幕顯示的符號是什麼功能??https://www.facebook.com/photo.php?fbid=597720173626009&set=a.492512750813419.113766.100001640941114&type=1&relevant_count=1&ref=nf在藍芽旁邊的??謝謝PS:要如何關掉??
