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[Q] Confused as to what bootloop is...

OP R[O]K.O.

26th February 2012, 08:42 PM   |  #1  
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Hi,

I have this behavior in my u20i phone that the phone will not boot. When i connect it to my PC, the PC detects the phone momentarily for around 5 seconds and then it disconnects and this will continue until i disconnect it. Does this mean my phone is bricked? Is this what a bootloop is? I read many threads on this forum, and for whoever was facing the problem of bootloop, he was atleast getting SE logo.

Now coming to my problem, i used s1tool to get the present details of my phone and it shows the following:

RUNNING S1_EROM VER "R8A029"
SOFTWARE AID: 0001
LOADER AID: 0001
FLASH ID: "0020/00BC"
LOADER VERSION: "R4A045"

MODEL (from GDFS): U20i
SOFTWARE VERSION: 1235-3411_2.1.1.A.0.6
CUSTOM VERSION: 1238-7170_R4B
.
.
SEMC SIMLOCK CERTIFICATE

The loader version tells me that the bootloader is not unlocked. Tried using SEUS update service to fix my phone back, but after completion, i still am stuck with this boot-looping. Any other suggestions? Any more information required to debug my problem? I had installed a custom rom which was working well (MiniCM7Pro_V21) until i restarted my phone which is when i got this problem. (had got a problem like this before but using SEUS had worked that time)

I can enter the flashmode of the phone atleast but thats it (this gives me some glimmer of hope )

My last resort will be to give my phone to the SE service guys but i wanna know what the problem is before i give it to them.
27th February 2012, 11:16 AM   |  #2  
Yashu1019's Avatar
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try again using SEUS????
27th February 2012, 02:55 PM   |  #3  
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Quote:
Originally Posted by Yashu1019

try again using SEUS????

Already tried both SEUS and also using PCCompanion repair option, none of them are working for me...
2nd March 2012, 07:59 PM   |  #4  
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Looks like a dying post faiyyaz helping out, but has come to a point where hez stuck, but anyway thanks a lot faiyyaz...Man, i just dont wanna give up and give it so SE guys, want to fix it my way...Anyway, any more suggestions will be helpful...
2nd March 2012, 09:24 PM   |  #5  
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Attaching the messages exchanged:
Quote:
Originally Posted by faiyyaz

Quote:
Originally Posted by R[O]K.O.

Quote:
Originally Posted by faiyyaz

Quote:
Originally Posted by R[O]K.O.

Hi, Its regarding a question i posted on xda developers, http://forum.xda-developers.com/show....php?t=1518652

Any help would be very much appreciated...

bro.. u aren't getting the Sony Ericsson logo when turn on?? n just to clear your confusion your bootloader is locked o no worries of that.. n 2ndly did u try the latest SEUS..? if not give it a try.. if not working PM again .

Used SEUS 2.12.3.5, got a successful message at the end, disconnected the phone and started the phone back again, but problem still exists...Any other ideas i can try out?

well that's weird.. i think the only way u can get it working is as you can get into flashmode, you can unlock bootloader then flash the nAa kernel as its got inbuilt CWM recovery,so u can get into recovery mode.. then u can flash a custom ROM.. a perfect ROM would be MiniCm7 by nAa itself n then if u want to get back to stock.. u may flash stock kernel.. then relock bootloader n then use SEUS to get back to Stock ROM.. its a long proceduce but i think it shall work.. if any query fell free to ask.hope that helps you
note: Make sure your following proper instructions while unlocking bootloader , use my tool if u want SE Tweaker Tool n follow correct instruction n read its main thread before u use it..

Quote:
Originally Posted by faiyyaz

Quote:
Originally Posted by R[O]K.O.

Oh and 1 more thing, how can i enable USB debugging when i cannot switch on the phone, by any external means possible?

Well sorry mate.. But I thought ur usb debugging might be on.. so I guess the unlock bootloader thing wont work for u.. Maybe u should try givin it to the service center if its under gaurante.. Else il see if there is any other way u can through..

Sent from my U20i using xda premium

2nd March 2012, 09:47 PM   |  #6  
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Hmm. Tricky. Have you tried using Flashtool to put a stock firmware back on?

Sent from my U20i using XDA App
The Following User Says Thank You to Ticklefish For This Useful Post: [ View ]
2nd March 2012, 10:07 PM   |  #7  
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Quote:
Originally Posted by Ticklefish

Hmm. Tricky. Have you tried using Flashtool to put a stock firmware back on?

Sent from my U20i using XDA App

Just tried it a few mins back, heres what i had on the flashtool disp:
Quote:

03/030/2012 02:30:56 - INFO - Selected U20i_2.1.1.A.0.6_Baseband_015.ftf
03/030/2012 02:30:56 - INFO - Preparing files for flashing
03/030/2012 02:30:56 - INFO - Please connect your device into flashmode.
03/031/2012 02:31:03 - INFO - Device connected in flash mode
03/031/2012 02:31:03 - INFO - Opening device for R/W
03/031/2012 02:31:03 - INFO - Reading device information
03/031/2012 02:31:03 - INFO - Phone reading for flashing.
03/031/2012 02:31:03 - INFO - Start Flashing
03/031/2012 02:31:03 - INFO - Flashing loader
03/031/2012 02:31:05 - INFO - Loader version : R4A045 / Bootloader status : UNROOTABLE
03/031/2012 02:31:05 - INFO - Flashing amss_fs.sin
03/031/2012 02:31:05 - INFO - Flashing cache.sin
03/031/2012 02:31:06 - INFO - Flashing fota1.sin
03/031/2012 02:31:06 - INFO - Flashing kernel.sin
03/031/2012 02:31:10 - INFO - Flashing amss.sin
03/031/2012 02:31:21 - INFO - Flashing fota0.sin
03/031/2012 02:31:22 - INFO - Flashing finished.
03/031/2012 02:31:22 - INFO - Please wait. Phone will reboot
03/031/2012 02:31:22 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings
03/031/2012 02:31:22 - INFO - Device connected in flash mode
03/031/2012 02:31:23 - INFO - Device disconnected
03/031/2012 02:31:25 - INFO - Device connected in flash mode
03/031/2012 02:31:49 - INFO - Device disconnected
03/031/2012 02:31:55 - INFO - Device connected with USB debugging off

Tried starting the phone but am having the same problem still...
3rd March 2012, 09:20 PM   |  #8  
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Have given the phone today to the SE guys, will let you guys knw if it gets fixed or not (they tried updating, said they used some factory sent updater which didn't work after which they said its a hardware issue, which somehow i doubt)...
8th March 2012, 01:40 PM   |  #9  
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Talking
Got my phone back today and its in good working condition. They said they replaced the flexicable of my minipro which was faulty. Anyway am happy that its working now and am ready to flash a rom into it again Thanks for all your help and suggestions...

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