Odin can’t open the serial (com port) – flash process failed

It sometimes happens that an update with Odin fails


Odin shows here a failed problem with the COM port.

This Com port is a virtual port that when you plug in the USB cable it is automatically found.

When can sort this problem when it happens?

Firstly go to Windows Task Manager and close all Samsung Kiss programmes that may be open.

Then remove all USB devices from your PC apart from mouse, keyboard, and the USB cable to your phone. If you have a USB hub then remove that too.

Now plug the USB that’s attached to your phone into a different USB port.

That should have sorted the problem and the flash then works.

Did you enjoy this post? Why not leave a comment below and continue the conversation, or subscribe to my feed and get articles like this delivered automatically to your feed reader.


Indeed, KIES messed up with USB. Killing Kies was enough.

Thank you very much fixed it for me!

Thanks kiling KIES worked

Yeah killing kies worked for me 2 ThaNKS BUDDY i got a bit of a scare when i was stuck on download mode and it would not connect

It worked for me too. thanks :)

thank you so much man you’re the best :D

3 hours of attempts, and it didn’t work, Then YOU, it works! Thank you so much!

Thank you so much!

how to kill kies pls help

how to kill kies

This solves the problem!
Note: I had to reboot the phone and restart Odin in order for Odin to recognize the phone again.

This solves the problem! Thank you so much!
Note: I had to reboot the phone and restart Odin in order for Odin to recognize the phone again.

it’s work,, thank’s…. :D

Thanks a lot, it worked for me =)

Very helpful, thanks alot :)

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I’d forgotten that Kies was running, thanks champ.

I do all that you’ve done the above but did not work.

I am what I am from Iran

tbanks it worked

thanks dear

Oh my goodness! a tremendous article dude. Thank you Nevertheless I am experiencing challenge with ur rss . Don’t know why Unable to subscribe to it. Is there anyone getting identical rss downside? Anyone who is aware of kindly respond. Thnkx.

Thanks!. Now i can flash my Galaxy Note fine! I’ve guessed bricked my phone but no! Thank You so much! Sorry my bad english. Greetings From Argentina!

Super Merci

I don’t understand it.. same problem here.. where can I find the KIES programmes and windows task manager?

in the windows task manager there is a task as kiss… or ktray… kill all task

Best regards

Thank you so much, It works me too…

Thanks a lot, it works for me !

Yep! You were right on! thanks much.

Doesn’t work to me… Error:

Enter CS for MD5..
Check MD5.. Do not unplug the cable..
Please wait..
N7100UBALJ1_N7100ZTOALJ1_N7100UBALJ1_HOME.tar.md5 is valid.
Checking MD5 finished Sucessfully..
Leave CS..
Odin v.3 engine (ID:3)..
File analysis..
Get PIT for mapping..
Complete(Write) operation failed.
All threads completed. (succeed 0 / failed 1)

my s3 is not working.my s3 is made in vietnam.pls few days ago it was stuck from boot screen.(samsung galaxy s3 gtI9300).i tryd volume up home and power not working.but its worked by volume down bottn.but i cant install custom os.in odin its fail by showing some errors.pllllllllllllllsssssssssss sm one help.

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