First off I want to say I cannot guarantee this will work for you nor can I take any responsibility for damages done to your phone following this tutorial. This is my first tutorial on the forum and i would really appreciate as much feedback as possible if this worked for you and even if it did not and why.
This tutorial is to unbrick your Galaxy mini, after a bad flash where you are getting errors in odin such as “setup connection” or “Serial port” problems. I have bricked my phone 3 times with a bad firmware leaving a blank screen, unable to get into download mode, and every time I’ve received a different response with the method.
Therefore this will require alot of your time in order to make it work. And i apologize in advance for any mistake, it took me all day to do this 3 times! And all 3 times resulted in success! Anyways let’s do tha’ business
---------------------------------
The main problem why you receive the error “setup connection” is because of a bad driver somewhere, so let’s start from scratch to ensure we get results.
Start by uninstalling the “Samsung USB” drivers and reboot your computer
By mixmasterlooney at 2011-09-03
Plug in the phone with battery inserted, windows may or may not play a sound.
After you plug in the phone, under “devices and printer” you will see “Samsung CDMA Technologies” with an error mark next to it.
By mixmasterlooney at 2011-09-03
This means windows has detected your phone, if you unplug the phone it will disappear, confirming it is no longer connected to windows.
Now with the phone still plugged in, install the drivers through Kies
By mixmasterlooney at 2011-09-03
After installing the drivers windows balloon will appear, click it to see more info and you should see this (Keep Kies running through out)
By mixmasterlooney at 2011-09-03
After that has finished installing you should then see this
By mixmasterlooney at 2011-09-03
Confirm all is installed by going back to device and printers and there should no longer be an error sign next to the Samsung CDMA device
After that you may or may not get an error message from Kies
By mixmasterlooney at 2011-09-03
Click okay, unplug the phone and close Kies, reboot your computer.
After starting up windows, plug the phone back in, windows will play a device connect sound.
Now open odin, odin will detect your phone even though you are not in download mode and should say
<1> Added!!!
<1>Detected!!!
At this point follow these steps
Step 1 – Prepare Odin with a WORKING firmware and make sure everything is ready to go
Step 2 – Remove battery, SIM card and SD card, and connect your phone if it isn’t already connected
Step 3 – Hold Volume down + Power + Home button at the same time
Step 4 – Insert the battery while holding down the above buttons
(Windows will detect your phone and start to install/configure the same drivers again wait for the drivers to finish installing)
Uploaded with ImageShack.us
(Odin is the critical driver that has not been configured so far)
Uploaded with ImageShack.us
(Drivers now finished installed and odin will display the yellow COM port in the next box)
Uploaded with ImageShack.us
Click start and wait for any error message All should be well now and your phone should flash back to a working firmware, but if that is not the case and you still receive “setup connection” error continue...
------------------
Extended tutorial...
Uploaded with ImageShack.us
If this is what you got or "Setup connection" continue...
If that did not work for you, unplug your phone remove the battery and reboot your computer
Once windows has started
• Click start then right click “Computer” then go to “manage”, when the manager window open click “device manager”
• Expand the drop down menu for USB (Universal Serial bus controllers)
• Right click and uninstall “Samsung USB composite device”
• Restart your computer
After starting up windows connect back the phone and more drivers should install
Now repeat step 1 to 4
It will most likely result in the same error and if so, open Kies, while Odin is still running and install the drivers again, this window may appear
I have no idea what this means there is a driver bug somewhere here between Kies and Odin
Uploaded with ImageShack.us
After installing the drivers, close odin, and remove the battery, follow step 1 to 4 again
If it fails, close kies and close odin, remove the phone battery
Now open odin load the files and prepare to flash,
And repeat step 1 to 4
A driver window will pops up showing Odin being installed
Uploaded with ImageShack.us
As soon as the yellow box appears in Odin hit the start button!
You will then see this, in the driver box, and as you can see Odin started installing the firmware.
In order for this to work, you may have to follow the extended part of the tutorial several times
If this is what you see instead though, it's too late and you must go back to step 1
Uploaded with ImageShack.us
Uploaded with ImageShack.us
When Odin has been started as soon as the yellow box appears you will see this instead
Uploaded with ImageShack.us
Uploaded with ImageShack.us
This tutorial is very complicated and I have tried to explain it as best as I can, hope it help some of you guys.
PS. If you have any USB driver problems or windows deleted problems with device managers or drivers in general causing errors you must fix these problems first or use a different computer, if the drivers wont install properly you cannot do it on that computer.
EDIT: Gingerbread 2.3.4 firmware, I can confirm this works
http://hotfile.com/dl/125835351/81792ef/S5570XXKPK_S5570XXKPK_S5570SERKPK.rar.html
This tutorial is to unbrick your Galaxy mini, after a bad flash where you are getting errors in odin such as “setup connection” or “Serial port” problems. I have bricked my phone 3 times with a bad firmware leaving a blank screen, unable to get into download mode, and every time I’ve received a different response with the method.
Therefore this will require alot of your time in order to make it work. And i apologize in advance for any mistake, it took me all day to do this 3 times! And all 3 times resulted in success! Anyways let’s do tha’ business
---------------------------------
The main problem why you receive the error “setup connection” is because of a bad driver somewhere, so let’s start from scratch to ensure we get results.
Start by uninstalling the “Samsung USB” drivers and reboot your computer
By mixmasterlooney at 2011-09-03
Plug in the phone with battery inserted, windows may or may not play a sound.
After you plug in the phone, under “devices and printer” you will see “Samsung CDMA Technologies” with an error mark next to it.
By mixmasterlooney at 2011-09-03
This means windows has detected your phone, if you unplug the phone it will disappear, confirming it is no longer connected to windows.
Now with the phone still plugged in, install the drivers through Kies
By mixmasterlooney at 2011-09-03
After installing the drivers windows balloon will appear, click it to see more info and you should see this (Keep Kies running through out)
By mixmasterlooney at 2011-09-03
After that has finished installing you should then see this
By mixmasterlooney at 2011-09-03
Confirm all is installed by going back to device and printers and there should no longer be an error sign next to the Samsung CDMA device
After that you may or may not get an error message from Kies
By mixmasterlooney at 2011-09-03
Click okay, unplug the phone and close Kies, reboot your computer.
After starting up windows, plug the phone back in, windows will play a device connect sound.
Now open odin, odin will detect your phone even though you are not in download mode and should say
<1> Added!!!
<1>Detected!!!
At this point follow these steps
Step 1 – Prepare Odin with a WORKING firmware and make sure everything is ready to go
Step 2 – Remove battery, SIM card and SD card, and connect your phone if it isn’t already connected
Step 3 – Hold Volume down + Power + Home button at the same time
Step 4 – Insert the battery while holding down the above buttons
(Windows will detect your phone and start to install/configure the same drivers again wait for the drivers to finish installing)
Uploaded with ImageShack.us
(Odin is the critical driver that has not been configured so far)
Uploaded with ImageShack.us
(Drivers now finished installed and odin will display the yellow COM port in the next box)
Uploaded with ImageShack.us
Click start and wait for any error message All should be well now and your phone should flash back to a working firmware, but if that is not the case and you still receive “setup connection” error continue...
------------------
Extended tutorial...
Uploaded with ImageShack.us
If this is what you got or "Setup connection" continue...
If that did not work for you, unplug your phone remove the battery and reboot your computer
Once windows has started
• Click start then right click “Computer” then go to “manage”, when the manager window open click “device manager”
• Expand the drop down menu for USB (Universal Serial bus controllers)
• Right click and uninstall “Samsung USB composite device”
• Restart your computer
After starting up windows connect back the phone and more drivers should install
Now repeat step 1 to 4
It will most likely result in the same error and if so, open Kies, while Odin is still running and install the drivers again, this window may appear
I have no idea what this means there is a driver bug somewhere here between Kies and Odin
Uploaded with ImageShack.us
After installing the drivers, close odin, and remove the battery, follow step 1 to 4 again
If it fails, close kies and close odin, remove the phone battery
Now open odin load the files and prepare to flash,
And repeat step 1 to 4
A driver window will pops up showing Odin being installed
Uploaded with ImageShack.us
As soon as the yellow box appears in Odin hit the start button!
You will then see this, in the driver box, and as you can see Odin started installing the firmware.
In order for this to work, you may have to follow the extended part of the tutorial several times
If this is what you see instead though, it's too late and you must go back to step 1
Uploaded with ImageShack.us
Uploaded with ImageShack.us
When Odin has been started as soon as the yellow box appears you will see this instead
Uploaded with ImageShack.us
Uploaded with ImageShack.us
This tutorial is very complicated and I have tried to explain it as best as I can, hope it help some of you guys.
PS. If you have any USB driver problems or windows deleted problems with device managers or drivers in general causing errors you must fix these problems first or use a different computer, if the drivers wont install properly you cannot do it on that computer.
EDIT: Gingerbread 2.3.4 firmware, I can confirm this works
http://hotfile.com/dl/125835351/81792ef/S5570XXKPK_S5570XXKPK_S5570SERKPK.rar.html
i had to try it several times to make sure it works, i still haven't had anyone who's tried it to confirm it works for them yet though, would be really appreciated if anyone who's tried it and had success let me know
but there is tutorial where it says the phone can be forced to download mode via connecting three 100k ohm resistors connected in series. The ends of the resistors should touch pins 3 and 5 of the USB connector. The two pins nearest the headphone jack. 
