What does happen changing customized firmware?

[ilCactuss]

Hello,
I tried searching in every Sony forum, I must be unlucky or I'm typing the wrong keywords.

I own a Xperia XZ Premium Dual (G8142), CDA 1308-6877 (customized HK), firmware 47.2.A.8.24 while the others have 47.2.A.10.80 (looking on xpericheck.com). I also own a Xperia XA2 Ultra Dual (H4233), with the same problem.

My question: can I change customization on my phone, and if yes, what should i do, to receive faster and the latest updates?

Thank you in advance,
Cactuss

 

[Didgesteve]

My question: can I change customization on my phone, and if yes, what should i do, to receive faster and the latest updates?

If you really feel there is some sort of advantage to having the latest firmware on your phone, then upgrade it yourself, you won't damage the phone or change your warranty status.

Look on Xperiafirm and find a 47.2.A.10.80 customised build - CE1 would be a good option
Download Newflasher and put it in the same folder as the firmware you downloaded from Xperiafirm
Delete Userdataxxx.sin and files ending in .ta (except in the boot folder). This will ensure that you don't lose any personal data. Also delete persist*.sin to avoid losing android attest key.
Then start newflasher.exe and follow instrctions.
You might need a copy of the Sony driver
I would make a backup with Xperia transfer before you do anything, if the phone is glitchty after your rebuild, then factory reset it and then restore from the backup.

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[ilCactuss]

Thank you for fast reply! You solved every doubt I had.
I hope Android 9 will roll out soon for my XA2 ultra (since custom HK is the last one with Android 8). If not, I will follow your instructions.

Just one more question: what about not deleting userdataxxx.sin and .ta files, for a clean install? I don't care to save personal data, since it's all cloud based.
Thank you again!

 

[Didgesteve]

Thank you for fast reply! You solved every doubt I had.
I hope Android 9 will roll out soon for my XA2 ultra (since custom HK is the last one with Android 8). If not, I will follow your instructions.

Just one more question: what about not deleting userdataxxx.sin and .ta files, for a clean install? I don't care to save personal data, since it's all cloud based.
Thank you again!

It's the userdataxxx.sin file that decides if the data folder is overwritten or not. Leave it in for a clean wipe.
The ta files need to go so you don't damage your TA partition that holds your DRM key.