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[Q] how to downgrade xperia sp unlocked bootloader

OP saurabhkh09

4th October 2014, 01:40 AM   |  #1  
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i wanted to downgrade my xperia sp to 4.1 but doing so i unloked my bootloader without backing up ta partition. me a complete newbie in flashing thing, plz can anyone give a complete guide to downgrade or to install cyanogenmod , i want a complete guide as i have no idea with cwm recovery is?? what to do ( searched a lot and just came up knowing names , besides that i dont want to do something stupid leads to brick my phone) so plz help me
Last edited by saurabhkh09; 4th October 2014 at 01:50 AM.
4th October 2014, 10:26 AM   |  #2  
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Quote:
Originally Posted by saurabhkh09

i wanted to downgrade my xperia sp to 4.1 but doing so i unloked my bootloader without backing up ta partition. me a complete newbie in flashing thing, plz can anyone give a complete guide to downgrade or to install cyanogenmod , i want a complete guide as i have no idea with cwm recovery is?? what to do ( searched a lot and just came up knowing names , besides that i dont want to do something stupid leads to brick my phone) so plz help me

Please can I know something. Have you done something with your SP? If you have, please tell me what you have currently done. If you don't, tell me that you haven't done anything.
4th October 2014, 10:39 AM   |  #3  
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Originally Posted by TechnoSparks

Please can I know something. Have you done something with your SP? If you have, please tell me what you have currently done. If you don't, tell me that you haven't done anything.

i have just unlocked the bootloader only nothing else ..
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4th October 2014, 10:46 AM   |  #4  
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Quote:
Originally Posted by saurabhkh09

i have just unlocked the bootloader only nothing else ..

So you have unlocked a bootloader. Could you please tell me what method did you used to unlocked your bootloader? Did you use FlashTool or the "fastboot" command in adb?
And based on your first post, I have to say that you have lost your DRM keys. Without DRM keys Bravia Engine won't work.
4th October 2014, 10:57 AM   |  #5  
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it was some cmd method i used to unlock my phone, can u plz help getting through 4.1 or flashing my phone to cyanogenmod 11 bcoz after 4.3 update phone is too damn slow , and said me completly new so plz step by step guide is expected save my butt bro, btw after unlocking is working as it was before slow draining battery as usual
4th October 2014, 11:00 AM   |  #6  
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Quote:
Originally Posted by saurabhkh09

it was some cmd method i used to unlock my phone, can u plz help getting through 4.1 or flashing my phone to cyanogenmod 11 bcoz after 4.3 update phone is too damn slow , and said me completly new so plz step by step guide is expected save my butt bro, btw after unlocking is working as it was before slow draining battery as usual

Okay I get you and I have the prerequisites beforehand. Now please confirm your intention. Do you want to use 4.1 or Cyanogenmod?
4th October 2014, 11:04 AM   |  #7  
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Originally Posted by TechnoSparks

Okay I get you and I have the prerequisites beforehand. Now please confirm your intention. Do you want to use 4.1 or Cyanogenmod?

i would love to try cyanogenmod ,, but i guess u have more idea so advice me anything which is fast, smooth, lag free and stable
4th October 2014, 11:11 AM   |  #8  
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Quote:
Originally Posted by saurabhkh09

i would love to try cyanogenmod ,, but i guess u have more idea so advice me anything which is fast, smooth, lag free and stable

I can't really give a suggestion. "Best ROM" depends on personal preferences. Since I am currently using CM11, I must say it works really great on my device. However, some people face problem with it such as being it laggy and everything. I hope you won't face the same thing.

Actually I have a guide that will solve your problem.

BUT BEFORE THAT please read everything there. Please follow the requirements. You may ignore any bootloader-related points. Since your bootloader is unlocked, you can skip guide number 1, and directly proceed to the section "Fastbooting DoomLord's kernel" in guide number 2. Then proceed normally afterwards. Get a CM M10 snapshot here. Psst, M11 is getting near!

Now you may go to the guide: http://forum.xda-developers.com/xper...e-xsp-t2888579
Last edited by TechnoSparks; 4th October 2014 at 11:32 AM. Reason: link moved to the bottom of the post
4th October 2014, 12:02 PM   |  #9  
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in order to downgrade , should i just follow 1b ??
4th October 2014, 12:25 PM   |  #10  
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Quote:
Originally Posted by saurabhkh09

in order to downgrade , should i just follow 1b ??

Yes if you want to downgrade you may just and only follow 1b. However needless to say, if your bootloader is unlocked, there's no more need to backup your TA partition

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