I have a Samsung Galaxy S4 i337M AT&T using it in Canada.
Right now its currently on 4.3 Jellybean but I cannot update it to the latest software as
when I click update it says something similar to "This version of Android has been modified and cannot update"
I know the reason why though, My S4 is software unlocked and I used this method http://forum.xda-developers.com/show....php?t=2291589 Called "Enable AWS on Samsung Galaxy IV AT&T i337 & Canadian i337M"
That unlocking method can only work on 4.3 but I've read some comments saying they have got it to work on the latest software.
I'm not sure how I would do it and I don't want to risk bricking my phone or anything like that.
Some of the new Galaxy S5 Apps that can work on my S4 cant because its still on 4.3 and the new apps work on latest software only.
If anyone knows how I can update and still have my unlocking without any problems please let me know.
Also : I tried putting the S5 Launcher and deleted my old S4 launcher and now the S5 launcher didn't work because it doesn't work on old 4.3 so now I'm using Nova Launcher but when I rebooted it said "Android is upgrading" and then said "reinstalling boot" and it showed that I have S4 Launcher back but when I clicked on it, it says "Unfortunately, Touchwiz Home has stopped" If anyone could give me a solution to fix this would be great.