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[Q] Enable SDXC write access on KitKat with Locked Bootlaoder LB?

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Default [Q] Enable SDXC write access on KitKat with Locked Bootlaoder LB?

Hi All,

Great community! Great Device! I just a Xperia Z Ultra and I am loving it! Upgraded from a Samsung Skyrocket.

Question. From what I've read it is possible to modify the system partition while maintaining locked bootloader. I would like to enable SDXC card write access without having a rooted phone.

I found this thread that talks about modifying "/system/etc/permissions/platform.xml" to enable access to the SDXC

Seems like it should work for the Xperia Z Ultra.

Is there anyway I can make this change offline without rooting my phone? Perhaps making a backup SEUS, editing and then restoring a modified version with flashtool?

I suppose I could downgrade, root, backup TA, upgrade, flash recovery, root, modify system and then relock.

Any advice on a better way. Does this sound like a reasonable plan?


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Location: Te Awamutu, New Zealand

I would do it the last way,
Backup TA
Unlock BL
Backup TA again (make sure to name it so you know it's the unlocked version)*
Flash recovery
Flash superSU update
Modify system

* This will allow you to re-unlock the BL without the data wipe that happens if you use flashtool/adb to unlock the BL
Alcatel One Touch "easy" -> Nokia 1110i -> Alcatel ame-408 -> Motorola Razr v3 -> Huawei u8100 -> Sony Xperia Z-Ultra

ROM:- Carbon
Kernel:- Pimped Kernel

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