Develop Bugs

[Q] Sony Xperia Arc S won't boot up.

When I try to boot it up (using the power button of course), the LED above the USB connection place flashes green, and the phone vibrates once and does nothing.
Any help would be appreciated, thanks.

Dr4G0nZ said:
When I try to boot it up (using the power button of course), the LED above the USB connection place flashes green, and the phone vibrates once and does nothing.
Any help would be appreciated, thanks.
Click to expand...
Click to collapse
Your question is too general. Did you do anything to your phone?

popthosegaskets said:
Your question is too general. Did you do anything to your phone?
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Click to collapse
I found the issue; can't use SEUS after you unlock the bootloader. Thanks anyways! All I did was flash a rom that relocked my bootloader (?? don't know the terms), and then run SEUS again.

you cant relock a bootloader with a rom.. you need help fro this thread. download a ftf firmware and flash t using flashtool so that the phone boots p and then check the bootloader status .....later depending on it, flash a custom kernel and rom (optional though recommended)

Dr4G0nZ said:
I found the issue; can't use SEUS after you unlock the bootloader. Thanks anyways! All I did was flash a rom that relocked my bootloader (?? don't know the terms), and then run SEUS again.
Click to expand...
Click to collapse
Well, there are scripts available that can relock the bootloader...
Link-in's method works too.
|
V
link-in said:
you cant relock a bootloader with a rom.. you need help fro this thread. download a ftf firmware and flash t using flashtool so that the phone boots p and then check the bootloader status .....later depending on it, flash a custom kernel and rom (optional though recommended)
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Click to collapse
Sent from my LT18i using xda app-developers app

popthosegaskets said:
Well, there are scripts available that can relock the bootloader...
Link-in's method works too.
|
V
Sent from my LT18i using xda app-developers app
Click to expand...
Click to collapse
Whoops, guess I meant I flashed an FTF... lol. Something I found on YouTube.
But yeah, I've run into another problem; while rooting the phone (using this guide over here: http://forum.xda-developers.com/showthread.php?t=1683957), I think I've bricked my phone again. I didn't enable USB Debugging and Unknown Sources, so it got stuck at Daemon Started Successfully. Haven't been able to boot into my phone since. Sorry if this problem has been solved before, wasn't able to find the solution while searching that thread.'
EDIT: ...sorry again, managed to stumble my way through and revive my phone.

Dr4G0nZ said:
Whoops, guess I meant I flashed an FTF... lol. Something I found on YouTube.
But yeah, I've run into another problem; while rooting the phone (using this guide over here: http://forum.xda-developers.com/showthread.php?t=1683957), I think I've bricked my phone again. I didn't enable USB Debugging and Unknown Sources, so it got stuck at Daemon Started Successfully. Haven't been able to boot into my phone since. Sorry if this problem has been solved before, wasn't able to find the solution while searching that thread.'
EDIT: ...sorry again, managed to stumble my way through and revive my phone.
Click to expand...
Click to collapse
Android is like that, phone brick doesn't mean need to send to repair centre, you can fix it urself
Sent from my LT18i using xda app-developers app

How to Unlock Bootloader for Branded Device

Hi,
I am trying to unlock the bootloader (and flash a new ROM) of my T-Mobile UK branded Xperia Arc. I followed the instructions on the (very helpful) guides on the forum and sony's dev website; the guide says that I need to pay to have it unlocked? and the dev site says I cannot get it unlocked because:
In your phone, tap Service info > Configuration > Rooting Status. If Bootloader unlock allowed says Yes, then you can continue with the next step. If it says No, or if the status is missing, your device cannot be unlocked.
Click to expand...
Click to collapse
And the "rooting status" option is missing. :/
So, how can I unlock the bootloader and flash a new ROM?
Many thanks in advance

kanay2000 said:
Hi,
I am trying to unlock the bootloader (and flash a new ROM) of my T-Mobile UK branded Xperia Arc. I followed the instructions on the (very helpful) guides on the forum and sony's dev website; the guide says that I need to pay to have it unlocked? and the dev site says I cannot get it unlocked because:
And the "rooting status" option is missing. :/
So, how can I unlock the bootloader and flash a new ROM?
Many thanks in advance
Click to expand...
Click to collapse
Only possible via paid method.

Someguyfromhell said:
Only possible via paid method.
Click to expand...
Click to collapse
The links are broken on the guides. What are the paid methods?

Contact alejandrissimo for that
Sent from my R800i using xda premium

Mine says : Yes, then i continued. Then i put my IMEI, However, IMEI given by my phone is 15 digits, so i decided not to include the first digit which is zero (0). I proceed with that very easy and helpful instructions very carefully. Done. Then, i tried booting in fastboot using flashtool and selected the custom kernel ArcKnight, but still getting error message that 'YOU NEED TO HAVE A ROOTED PHONE' when in fact my phone is rooted with Busybox 1.8.1. What have i done wrong? Please help.
Sent from my LT15i using xda app-developers app

whiskey_1388 said:
Mine says : Yes, then i continued. Then i put my IMEI, However, IMEI given by my phone is 15 digits, so i decided not to include the first digit which is zero (0). I proceed with that very easy and helpful instructions very carefully. Done. Then, i tried booting in fastboot using flashtool and selected the custom kernel ArcKnight, but still getting error message that 'YOU NEED TO HAVE A ROOTED PHONE' when in fact my phone is rooted with Busybox 1.8.1. What have i done wrong? Please help.
Sent from my LT15i using xda app-developers app
Click to expand...
Click to collapse
You don't need root to install custom kernel. You need to unlock bootloader.
You got Branded and/or SIM-locked device? Then you can do it only via paid method.

whiskey_1388 said:
Mine says : Yes, then i continued. Then i put my IMEI, However, IMEI given by my phone is 15 digits, so i decided not to include the first digit which is zero (0). I proceed with that very easy and helpful instructions very carefully. Done. Then, i tried booting in fastboot using flashtool and selected the custom kernel ArcKnight, but still getting error message that 'YOU NEED TO HAVE A ROOTED PHONE' when in fact my phone is rooted with Busybox 1.8.1. What have i done wrong? Please help.
Sent from my LT15i using xda app-developers app
Click to expand...
Click to collapse
If it says yes doesn't mean it is unlocked and you can flash kernels you need to unlock it you can do it free and of imei last no. Should be erased to get 14 digit imei. Go to fast boot mode and unlock it and then flash kernels
Sent from my R800i using xda premium

Custom ROMs for stock kernel

I'm curious on how difficult it is to fix a ROM to run on stock kernel? Does anybody know of a good tutorial? I love my ion but unfortunately can't unlock the bootloader which leaves me with a stock kernel
Sent from my LT28at using xda premium

Now you can unlock bootloader

V_Nay said:
Now you can unlock bootloader
Click to expand...
Click to collapse
And How???
I have Xperia S with stock .96 rom.

rErEaT said:
And How???
I have Xperia S with stock .96 rom.
Click to expand...
Click to collapse
http://developer.sonymobile.com/unlockbootloader/unlock-yourboot-loader/
Select your device and READ & FOLLOW each every step. Enjoy unlocking bootloader

V_Nay said:
http://developer.sonymobile.com/unlockbootloader/unlock-yourboot-loader/
Select your device and READ & FOLLOW each every step. Enjoy unlocking bootloader
Click to expand...
Click to collapse
Bootloader unlock allowed says No!

rErEaT said:
Bootloader unlock allowed says No!
Click to expand...
Click to collapse
Sorry but you can´t install any rom with a custom kernel , roms with original kernel only like this rom http://forum.xda-developers.com/showthread.php?t=2463579

rErEaT said:
Bootloader unlock allowed says No!
Click to expand...
Click to collapse
It's because you have a carrier locked Xperia S. The above method wont work with it, also if you have the SIM unlock code the bootloader wont unlock. Do one thing,mail your carrier and sony asking if unlocking bootloader is possible.
BTW you can still root your device and install custom ROMs just search the forum.

how to unlock r800at&t bootloader

i got R800at&t
supposed it is r800a. but i cannot find a way to unlock it bootloader.
so anyone can help me out.

blackbox92 said:
i got R800at&t
supposed it is r800a. but i cannot find a way to unlock it bootloader.
so anyone can help me out.
Click to expand...
Click to collapse
Here is the link to the official Sony guide to unlocking your bootloader
Link
Hit Thanks if I helped :good:

i_like_chicken said:
Here is the link to the official Sony guide to unlocking your bootloader
Link
Hit Thanks if I helped :good:
Click to expand...
Click to collapse
isnt that for r800i phone?
mine is r800a, tq btw,

blackbox92 said:
isnt that for r800i phone?
mine is r800a, tq btw,
Click to expand...
Click to collapse
Have you tried checking the service menu?
Open the dialler and enter *#*#7378423#*#* to access the service menu
Service info > Configuration > Rooting Status.
Does it say bootloader unlock allowed?

i_like_chicken said:
Have you tried checking the service menu?
Open the dialler and enter *#*#7378423#*#* to access the service menu
Service info > Configuration > Rooting Status.
Does it say bootloader unlock allowed?
Click to expand...
Click to collapse
it does not say anything about bootloader,
i think it can be done, i have seen many thread say that someone can do it. but need to pay.
if can, i want to do it myself.

Download sony flash tool from official site.
Tap'd from burst

blackbox92 said:
it does not say anything about bootloader,
i think it can be done, i have seen many thread say that someone can do it. but need to pay.
if can, i want to do it myself.
Click to expand...
Click to collapse
Here's a complete guide on how to unlock the R800a Bootloader Link
Updated link: :good:

i_like_chicken said:
I haven't tried unlocking bootloader using flash tool but here is a guide Link
Click to expand...
Click to collapse
no u dont understant man,
it is r800a
it not easy to get a fastboot,

blackbox92 said:
no u dont understant man,
it is r800a
it not easy to get a fastboot,
Click to expand...
Click to collapse
Sorry, the only way to unlock that is by using the test point method Here

R800a is not an R800at. R800a is for south american market and r800at is for us market. Unlock r800at you have to pay via testpoint method.

chery2k said:
R800a is not an R800at. R800a is for south american market and r800at is for us market. Unlock r800at you have to pay via testpoint method.
Click to expand...
Click to collapse
So where do i find it .tft if something goes wrong,
Sent from my R800i using Tapatalk 2

xda search.

[Q] Unlocking Bootloader without SDK

Hi. So, I have a SONY XPERIA S with bootloader locked. I recieved a mail from SONY with the unlock bootloader key. The next step should be to download the SDK. But since the SDK is almost 500 MB in size and I have a slow connection, and a limited data plan I cannot download the SDK. My question is : Is there another easy way to to this? To unlock my bootloader?

i'm not sure if this help, but just trying to help
http://forum.xda-developers.com/showthread.php?p=42407269

Perfect
Alin Theron

Any advantage of unlocking?

This is general section, pls post question on Q&A section... Tq
Sent from my LT26w using xda premium

The advantage is that with unlocked bootloader I can make root

AlinTheron said:
The advantage is that with unlocked bootloader I can make root
Click to expand...
Click to collapse
Mmm, did you know that you can 'root' with locked bootloader also?... the real advantage is that you can use custom kernels

I tried, not working.

Any ideas on how to root with locked bootloader?

AlinTheron said:
Any ideas on how to root with locked bootloader?
Click to expand...
Click to collapse
Yes.

AlinTheron said:
I tried, not working.
Click to expand...
Click to collapse
Would you mind sharing more feedback of what you have already tried for rooting?? and which steps are you failing at? so we can help you out :cyclops:

I've tried a zip package from doomlord

i'm using XAS, base on .200 ROM, all i do to root was this.
1. UL BL
2. http://forum.xda-developers.com/showthread.php?t=2309117
3. place this SuperSU-1.25-Busybox-1.20.2-UPDATE.zip file from http://forum.xda-developers.com/showpost.php?p=42005929&postcount=3 onto internal storage
4. flash SuperSU-1.25-Busybox-1.20.2-UPDATE.zip in recovery
that's what i did on both XAS

I'll try it right now

Done. SOLVED

Now it works just fine.

SOLVED

How to get the key from Sony?
Sent from my LT26i using Tapatalk 4 Beta

http://unlockbootloader.sonymobile.com/instructions