When I try to connect my Galaxy S2 device to my computer via USB, I get an error saying that the device has malfunctioned and is unrecognized. It appears as "Unknown device" in device manager.
I'm using Windows 7.
In addition to what the others have already answered, if you just want to access the files on the phone's storage and SD card, you can just mount the file system.
Unplug the USB cable, then Settings > Wireless and network > USB utilities > Connect storage to PC
I tried this from my Samsung Galaxy Ace Plus and it worked:
try to key in this in dialer
it has 4 option there..
UART MODEM PDA USB MODEM PDA
For usb. select the PDA.if it already selected to PDA. reselect it by select MODEM and then PDA again.. Only change the USB setting.. andthen press back. try reconnect to kies again.. hope it helps..
This problem might be because you dont have the neceasary drivers. Make sure you have the
USB debugging mode ON for your device. Then use
Samsung Kies, a software like itunes, to detect your device.
Hey you can try to solve this in two ways either you can download Samsung Kies and using that you can connect your phone , or if not by that way then u can check in your phone that is your USB Debugging On its in settings Option > Application > Development see that is it checked or not, if its checked then it means its on..
You Can also Download PDA NET and install in your PC thats also one of the way if you dont want to install Samsung Kies
Are you sure that USB Debugging mode is on?
Settings > Applications > Development you should see an option for
USB Debugging -- if that isn't checked you won't be able to mount your phone.
I've had the same problem. I was so annoyed that I did a factory reset. It clears all your data, but it also solved my issue.
When windows sees it as "the device has malfunctioned" it is a different issue than when it says "drivers were not installed, your device may not work properly. " If it says "malfunction" it is a problem with the usb hardware connections themselves, albeit the cable end or the device port. Try using some electrical contact cleaner and a soft tooth brush and the clear the port with a compressed air duster can. Just spray a little of the cleaner on the brush and gently clean your port and/or cable. Then spray area just enough to dry with air duster. Worked well for me. If you take it to a service shop they will do it for you for a minimal fee.
I had the same prob as my S3 is not deteced on my MAC , but it is very easy to solve:
Isn't it so strange that on some computer config it is not a problem??? In many cases a third party software is the badass ( e.g. firewall, antivirus apps.) Always try on another machine before you go back to the shop:-)