iPhone4用了很久的4.3.5可以升级4或6系统吗？

可以啊…Tonight and forever tonight and foreverIt''s just another night another dayYour heart is still so far awayI need to be near I never thoughtthat I would feel this wayBut now I know that I am sureI wish you were here I wanna be here right by your sideI wanna be the only oneCan I hold you tonight and foreverbaby It doesn''t matter where you areWe will never be apart I''ll be thereTonight and forever And everything that you are by my sideMy heart is written oh so clearI feel like a child So hear me out andside I wanna be the only oneCan I hold you tonight And forever babyIt doesn''t matter where you areWe will never be apart I''ll be thereTonight and foreverIt''s doesn''t matter where you stayI will hold you anyway in my heartTonight and forever I should have told you butI didn''t know how Wish I was holding you now Tonight and forever Tonight and foreverI should have told you where you are doesn''t meaterwe won''t be apartTonight and forever Where you stay.I will be there with you anywayTonight and forever It doesn''t matterwhere you are we will neverbe apart I''ll be there Tonight andforever It doesn''t matter whereyou stay I will hold you anyway in my heartTonight and forever Tonight and forever Tonight and forever