I want to revert to JB 4.3 from KK 4.4.2. Partly because of battery life, RAM use but also because I'm using an external SD card - which basically is pointless from 4.4. on as I've understood... Yes, I can store media files there, but I cannot move 3rd party apps from my internal storage (which I want to keep "clean"); e.g. I cannot move a Kindle book from the internal storage and on to the external SD card.
Also, I've noticed that when I take a picture it is stored on my SD card as I've chosen in the options, but if I edit it the edited version is saved on the internal storage... and uses precious space there. And the only program I can use to relocate it to where it belongs is FileCommander, which isn't the file manager of my choice, to put it that way...
The reason I chose this phone rather than i.e. an iPhone 32GB was, apart from it's (at least supposed to be ) waterproof, is (or rather was, at the moment) the option of using an external SD card to augment the somewhat abysmal storage capacity of 16 GB. With Google's new policy that only 1st party apps can write to it, the point of having an SD card becomes quite debatable...
So, basically - I want to go from Sony KitKat 4.4.2 back to Sony JellyBean 4.3 - nothing more.
And then, the questions I need to ask - and hopefully receive answers to. Perhaps people in the Nordic countries - and specifically Norway are best suited to help me.
1) I was thinking of simply using the approach in this video: http://www.youtube.com/watch?v=zNE3eZnlHIw
Which is basically using an official Sony 4.3 flash and use that and flashtool to overwrite 4.4.2 on the phone. ...or did I miss something?
I've noticed that I do not have any Developer options under my settings, but it seems that USB debugging is on by default.
a) Will this require that I unlock the bootloader (and perhaps void my warranty - living in Norway)? I can do so (unlock bootloader says "yes").
b) Should I root the device - do I need to back up the TA partition? Also because of potential warranty issues... I cannot understand why, as the phone had JB 4.3 when I got it anyway...
2) Is this 4.3 ftf usable for me, living in Norway? http://forum.xda-developers.com/show....php?t=2657610
I've noticed that some have expressed a little irritation since this ROM is in Chinese... Which I of course can't use. Is this usable anyway? Or are there any other more or less official ROMs I can download - I'd be happy enough even if from Sony itself?
I think that's all - at least for now. Hope some guru out there is able to help me.