If the phone itself doesn't show any update options in "Settings" then there actually is no update for that device. So unless you want to root it (which I cannot help with) you would not be able to have a newer OS unless you got a different phone.
If the phone itself doesn't show any update options in "Settings" then there actually is no update for that device. So unless you want to root it (which I cannot help with) you would not be able to have a newer OS unless you got a different phone.