Originally Posted by ironass
I doubt very much that that is the problem as Android 4.3
is Jelly Bean
You do not mention which model of S4 you have or which carrier you are with, unfortunately. See, 23 Galaxy S4 models - know yours?
Most International models in Europe can be unlocked by the carrier for a small sum or for free.
Oh yes, Jelly Bean, sorry
Its locked to 3, I think I said this in the original post
The model is gt-i9505
baseband ver - i9505xxuemk9