Installation Steps (Warranty can be restored whenever you wish)
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Before starting your rom flashing journey it is always better to have Flashtool (latest -by androxyde) installed in your PC and your stock rom handy ; incase of any mishappenings.
Type *#*#7378423#*#* in your phone and see if your bootloader status is unlockable under service-->Configuration. Procede with below steps, only if your device is unlockable.
It is important that you follow the steps in order
1) First step for installing a custom rom over a mobile with stock rom is to backup the existing state of bootloader .Usually warranty will get void if any modification is done to bootloader. The below tool ensures that it takes the backup of existing state of bootloader when device is under warranty.
Goto
Backup TA for Sony Xperia (This tool helps you to have a )
http://forum.xda-developers.com/showthread.php?t=2292598.
Download the tool.This tool will backup your DRM Securtiy keys . Successful backup can only be taken after the existing stock rom is rooted (Use towelroot application if your device is not already rooted) .Root it first then follow the process given in above link .
Once this is over , u will have a backup of the existing state of bootloader/TA partition (If you later wish to move back to stock rom from custom rom use the same tool to restore the backup you have just created.This means you will get your Warranty back);
2) Goto this website , follow the steps and get your unlock code via e mail.
Use fastboot mode to unlock your bootloader (Make sure that you have already backuped your existing DRM keys-Step 1).Follow it fully to unlock your bootloader
http://unlockbootloader.sonymobile.com/unlock/step1
3)Download any custom rom zips with recovery, for your mobile from xda developers forum and have fun.Extract boot.img using winrar or winzip .
Flash boot.img via fastboot mode
fastboot flash boot boot.img
fastboot reboot
4)As the device reboots, when you see your LED glow press volume up or down. It will take you to CWM Recovery or TWRP recovery based on the rom that you have downloaded.
5)Just install the custom rom(*.zip ) from within the recovery.
What if that i already have the custom recovery?
So, just wipe data, dalvik, and cache, then flash the zip?
That's it?
AndreIrawan97 said:
What if that i already have the custom recovery?
So, just wipe data, dalvik, and cache, then flash the zip?
That's it?
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yes.
AndreIrawan97 said:
What if that i already have the custom recovery?
So, just wipe data, dalvik, and cache, then flash the zip?
That's it?
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Absolutely right. But before installing an custom rom in the first place i hope you have already backed up your DRM keys for warranty purpose(as mentioned in the guide) since if you unlock your bootloader without backing up your DRM keys, DRM keys might be lost forever .
gokukaushik said:
Absolutely right. But before installing an custom rom in the first place i hope you have already backed up your DRM keys for warranty purpose(as mentioned in the guide) since if you unlock your bootloader without backing up your DRM keys, DRM keys might be lost forever .
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Can i backup my app on stock rom then restore it to a custom rom?
AndreIrawan97 said:
Can i backup my app on stock rom then restore it to a custom rom?
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Sure. Easiest way to do it is by using an app called, 'Titanium Backup Pro'.But you have to root your stock rom first for this application to run(Use towelroot if you are yet to root).Except for sony proprietary apps like walkman,Album,etc (will run only on stock rom as they use sony developed system libraries/API'S) other apps will get restored/run fine on a custom rom.
gokukaushik said:
Sure. Easiest way to do it is by using an app called, 'Titanium Backup Pro'.But you have to root your stock rom first for this application to run(Use towelroot if you are yet to root).Except for sony proprietary apps like walkman,Album,etc (will run only on stock rom as they use sony developed system libraries/API'S) other apps will get restored/run fine on a custom rom.
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And one think left.... How to know if my bootloader is unlocked or not?
AndreIrawan97 said:
And one think left.... How to know if my bootloader is unlocked or not?
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its in the OP....on the phones dialpad, type: *#*#7378423#*#*
then look in > service > configuration
it should show the status as "bootloader locked", "bootloader unlocked", "bootloader unlockable" or "not unlockable" (sorry wording may not be exact, but you'll get the idea)
foomanjackel said:
its in the OP....on the phones dialpad, type: *#*#7378423#*#*
then look in > service > configuration
it should show the status as "bootloader locked", "bootloader unlocked", "bootloader unlockable" or "not unlockable" (sorry wording may not be exact, but you'll get the idea)
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no.. i mean, how to know if my bootloader is already unlocked or not?
Anyway, what happened if i flash it without unlocking it first?
Sorry, did you type that in the phone and check the status? That's where it will tell you if its already unlocked or if its even unlockable at all.
Do not try to install a custom ROM on your phone if it is not unlocked! Your phone will not boot.
AndreIrawan97 said:
no.. i mean, how to know if my bootloader is already unlocked or not?
Anyway, what happened if i flash it without unlocking it first?
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Thanks to @ foomanjackel for answering your questions.Regarding your 2nd question, 'Experience is the mother of invention'.Why don't you try and see what happens...just kidding.Couldn't resist it. Practically speaking of you install a custom rom with an custom kernel on a locked bootloader you will hard brick it.It will not boot and chances are that you might not be able to goto flashmode or fastbootmode anymoreto repair it.Reason this happens is that both your recovery and bootloader resides in the same partition in your mobile.If you try to install custom kernel on a locked bootloader in every probability, it not only corrupts your existing stocks kernel but also might corrupt your recovery leaving u helpless.
Theoretically, You should be able to install any custom-stock based rom on a locked bootloader (which runs exactly on ur stock kernel).In other words a custom rom which doesn't come up with a custom kernel but based on your existing stock kernel should be able to run on a locked bootloader.But my advice is you do not risk it.
foomanjackel said:
Sorry, did you type that in the phone and check the status? That's where it will tell you if its already unlocked or if its even unlockable at all.
Do not try to install a custom ROM on your phone if it is not unlocked! Your phone will not boot.
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Yes it said boot loader unlockable : yes
And couple months ago, i want to unlock my bootloader, but i dont know what went wrong, but my xperia got boot loop...
So is that bcs i already unlocked it? Or... ?
AndreIrawan97 said:
Yes it said boot loader unlockable : yes
And couple months ago, i want to unlock my bootloader, but i dont know what went wrong, but my xperia got boot loop...
So is that bcs i already unlocked it? Or... ?
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If you get this message "Bootloader unlockable: yes" then your bootloader is still locked.
gokukaushik said:
If you get this message "Bootloader unlockable: yes" then your bootloader is still locked.
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Is unlocking bootloader can make me lose my root?
AndreIrawan97 said:
Is unlocking bootloader can make me lose my root?
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I suppose it won't.I don't see the reason why u want to unlock the bootloader unless you want to install a new custom rom.
Hi, I want to install phoenix rom on my tab s t800, but I have one question.
I don't understand when I have to flash the developer's bootloader, before or after gain root with cf root+twrp?
I'm on stock lollipop.
Thanks
Just flash the rom with twrp first. If it doesn't boot then you will need to flash the bootloader.
ashyx said:
Just flash the rom with twrp first. If it doesn't boot then you will need to flash the bootloader.
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Thank you
is there possible to lock the bootloader after flashing custom rom ?
feel2death said:
is there possible to lock the bootloader after flashing custom rom ?
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NEVER lock bootloader on Custom Rom, there is no reason why.
DenisCZ said:
NEVER lock bootloader on Custom Rom, there is no reason why.
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There are valid reasons to lock your bootloader, but it shouldn't be done with unofficial software (a Custom ROM).
When the bootloader is locked, only signed software is allowed to boot, so only official ROMs can boot.
cyanGalaxy said:
There are valid reasons to lock your bootloader, but it shouldn't be done with unofficial software (a Custom ROM).
When the bootloader is locked, only signed software is allowed to boot, so only official ROMs can boot.
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so u cant boot with custom rom when the bootloader locked even it already installed with custom rom ?
feel2death said:
so u cant boot with custom rom when the bootloader locked even it already installed with custom rom ?
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Correct
why would you want to loick the boot loader after a custom rom is installed to begin with?
Hoping to get this fixed, after flashing a twrp tar file my phone cannot boot to rom or even recovery, but bootloops, is there a potential fix? Do I need to bootlock and unlock my phone?
What do you mean by "bootlock"?
Did you unlock your bootloader before flashing?
V0latyle said:
What do you mean by "bootlock"?
Did you unlock your bootloader before flashing?
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Yes I did unlock my bootloader before flashing, what I mean by bootlock is locking the bootloader through download mode.
wavetsuname said:
Yes I did unlock my bootloader before flashing, what I mean by bootlock is locking the bootloader through download mode.
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Never lock your bootloader unless you have flashed back to factory stock. Locking the bootloader on modified firmware will brick your device.
When you are in download mode, look at the upper left corner of the screen. There should be a line that reads OEM LOCK. Is this ON or OFF?
Which TWRP build are you using?
Factory stock is the only firmware I'm able to flash successfully, in download mode it says "OEM LOCK: OFF(U)", I attempted to flash TWRP 3.5.2, here's the file if needed, I have also attempted to flash other TWRP versions, but none worked.
I managed to get orange fox working, and it turned out I flashed the wrong stock ROM for my phone.
To flash TWRP with odin - one of previous version of stock ROM required. On the latest versions of stock ROM it is impossible to flash TWRP - the device goes into the bootloop.
Hello there, I'm a new user on Samsung device. I went to install custom rom on my device. There is no rom for this SM-A225F model, So I went to downgrade. I don't know if this is possible or not, I just asked to know. And developers do not get its source code? So that we can't use custom rom on this phone too, I am eager for custom rom. Thank you all.
If your bootloader is unlocked, you can use Odin to downgrade...unless the bootloader has an anti-rollback.
V0latyle said:
If your bootloader is unlocked, you can use Odin to downgrade...unless the bootloader has an anti-rollb Yes, I have unlocked the bootloader but not with odin on the phone
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V0latyle said:
If your bootloader is unlocked, you can use Odin to downgrade...unless the bootloader has an anti-rollback.
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Yes, I unlocked bootloader but I didn't do it with odin software. I have done this with another device and Bugjaeger apk, which is more simple from odin software.
You can't flash firmware with an APK. You must use Odin or Heimdall.
V0latyle said:
You can't flash firmware with an APK. You must use Odin or Heimdall.
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Thank you