Downgrade to 4.1 - Xperia Z1 Q&A, Help & Troubleshooting

Hi all, I wonder if I can go downgrade to 4.1 jb to enter engineer mode?
How could port a rom?
THX

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[Q] I am on 4.3 can I install 4.2 ?

Hi
I have install 4.3 rom and the last firmware
now can i install 4.2 roms ??
or i cant do it ? just i can install 4.3 roms??
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tnx
Yes
If you've an unlocked bootloader you can do all what you want

[Q] [HELP] Replace JB 4.3 Baseband

Hay everyone!
Can you guys kindly tell whether can I flash baseband from JB 4.1 stock rom, on my current JB 4.3 stock rom via flashtool? Pls anyone can explain this?
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XSP JB 4.3 Stock with LB.

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