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Problem with GT-I900 upgrade

Hi I was trying to upgrade the Android Version on a Galaxy S2.
I installed Clockwork Mod Recovery and was able to boot into it but couldn't access the SD for installing image.
I booted into the downloading screen ( vol down and power on boot ) and installed an image then bootloader via Odin.
Now when I boot there is the standard Samasung Galaxy S2 logo and I can't access the downloading screen or clockwork mod and it just goes to the animated S logo with usb not recognized appearing on the connected Windows box.
Is there anyway to restore from this point?

Are you able to access the phone through ADB?
If yes, run: adb reboot download, and this should put you in downlaod mode so you can odin a new firmware.
If no adb access, Does odin recognize the phone?
If yes, you should be able to odin a new firmware.
Make sure when you flash the new firmware you are using the correct rom for your device. ie: from your post you have a GS2 I9000 which is not the same as the GS2 SGH-T989.
you would use roms from this forum: http://forum.xda-developers.com/forumdisplay.php?f=665
If you are unable to flash a rom you can always purchase a download mode jig to get you into download mode if you have not Hard Bricked the phone. If you have Hard Bricked your phone there are a couple of sites that do Jtag repair to unbrick your phone.
Good Luck

No reponse from Odin or ADB
I have purchased a download mode jig hopefully it will work.
Thanks for your advice

[help] Keep rebooting to CWM Recovery

HI Guys,
I tried rooting and flashing CWM in my fiancee mobile (Samsung Galaxy core GT-i8262,Indian version). I rooted the phone successfully and Iflashed CWM using adb method using some guides here. But after flashing |cWM, i tried rebooting in to CWM recovery and recovery came fine. But When I select "Reboot to System" from CWM, it again rebooting to CWM only.. I thought I soft bricked my phone and tried to flash the stock firmware via odin.
But I shocked by seeing the USB drivers are not recognized by PC. I can see yellow mark in Samsung USB CDC Composite devivce" .. So ODIN also not recognizing my phone...
Can you guys help unbricking my phone.. I can go to download mode using CWM recovery. But My problem is USB error...
Kindly help.. any help would be appreciated.
PS: I tried unstalled the drivers in Device manager,installed again, tried rebooting my PC, tried installing again the USB drivers, tried Installing Samsung kies.. but still the yellow mark is showing.. Once the USB issue fixed, I can flash the firmware my self... Thanks in Advance....

hi man...
i face the same thing
1-download drivers for your core gti8262
2-install it on your pc
3-down and install odin
4-conect your phone in download manager
5-now reinstall the cwm recovery
6-install the rom u want from your sdcard in the cwm recovery
7-boot your phone and all done
so sorry for my bad en language..

Try to Connect with different usb cables! I think the prob is with ur cable. If it's not u will need a USB Jig to boot into Download mode,U can find it online & purchase it from abroad. -Hope it helps!

Soft bricked undetectable s6

Recently i flashed alliance rom version 1 on my 5.1.1 G920i samsung galaxy s6 because i was stupid and tired, anyway... ever since then i've been stuck in a boot loop but when i went into recovery mode via TWRP i couldn't restore any backups or anything and nothing worked. When i plugged my phone into my pc it wasn't registered even after installing drivers, odin or command prompt couldn't detect it either. So now i have an S6 that has been factory reset on a ROM that doesn't work and my phone won't register on pc at all. Tried on 2 different pc's.

Enter în download mode and restore your phone using smartswitch or odin

http://forum.xda-developers.com/galaxy-s6/help/to-softbricked-phone-t3379387 try this

Diaze said:
Enter în download mode and restore your phone using smartswitch or odin
Click to expand...
Click to collapse
my phone won't connect to pc though but thank you anyway

Install this firmware it helped for me http://forum.xda-developers.com/galaxy-s6/help/to-softbricked-phone-t3379387

No Recovery, No System, USB not recegnized by Windows (PLEASE HELP!)

Good Evening,
I own a Samsung Grand Neo Plus (GT-I9060i) and I was running a dotOS v1.2, rooted and bootloader unlocked. I recently downloaded an app called Rashr from Play Store to flash a TWRP recovery because i couldn't flash the stock rom in my CWM recovery, after flashing the TWRP img file the phone rebooted and nothing more happened, I tried to go into recovery mode but nothing happen, even doesn't boot into the System, and when i try to flash the stocke frimware and the TWRP recovery with odin the windows says that the USB not recenized even i am allready have all drivers installed and updated and in bootloader mode .. i have another I9060i it works with no problems with Odin and Windows
Now I don't have recovery to flash a Rom and the Windows USB Problem and no System
I just want to fix the USB Problem or just a idea to install any recovery to flash any Rom to get the phone to life again
If anyone can help me i will be very happy,
Thank You

georgemshaty said:
Good Evening,
I own a Samsung Grand Neo Plus (GT-I9060i) and I was running a dotOS v1.2, rooted and bootloader unlocked. I recently downloaded an app called Rashr from Play Store to flash a TWRP recovery because i couldn't flash the stock rom in my CWM recovery, after flashing the TWRP img file the phone rebooted and nothing more happened, I tried to go into recovery mode but nothing happen, even doesn't boot into the System, and when i try to flash the stocke frimware and the TWRP recovery with odin the windows says that the USB not recenized even i am allready have all drivers installed and updated and in bootloader mode .. i have another I9060i it works with no problems with Odin and Windows
Now I don't have recovery to flash a Rom and the Windows USB Problem and no System
I just want to fix the USB Problem or just a idea to install any recovery to flash any Rom to get the phone to life again
If anyone can help me i will be very happy,
Thank You
Click to expand...
Click to collapse
Samsung has download mode, not bootloader mode(kinda the same but not exactly because download mode is not fastboot compatible but devices with bootloader mode are fastboot compatible).
As for the issues you're having, try this thread for troubleshooting a failed Odin flash.
https://forum.xda-developers.com/galaxy-s2/general/guide-t2345831
Sent from my LGL84VL using Tapatalk

Help! Samsung i8262 soft bricked.

I have a Samsung core i8262 device, i flashed with Cosmic Rom last night and it is stuck on the logo of cosmic rom, I have installed CMW recovery but i can't find my sd card in there, it shows " Choose zip from auto", when i click that it doesnt do anything, i tried entering download mode but odin doesn't detect my phone, i have tried installing & reinstalling kies but no results, installed samsung drivers and adb nothing works, i currently can enter cmw recovery and download mode, but download mode doesnt detect in my pc i tried in my laptop too no results, can someone help me, by mistake i've wiped system in cmw after installing cosmic rom, so i think thats the problem, any suggestions?:crying::crying:

Do you tried to change the usb cable?

Try a different odin version or try opening odin in admin mode first then connecting your phone to the cable (with the phone already in download mode before you plug it in)