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USB unknown device

I've tried the drivers from Samsung, Keis, ODIN one click. None of them worked on 4 different machines, Windows 7 both x64 and x86(which was a fresh install), and two Windows XP machines. I tried it on Ubuntu(10.04 LTS) and that recognized the captivate.
Anyone know how to get one of those to correctly recognize my Captivate so I don't stuck on Samsung's/AT&T's 2.2

uninstall all of the driver that you downloaded. uninstall kies. then go to samsung.com search for the captivate, choose you phone, click the 'i own this' button. then go to get downloads, software. click on the .zip file icon next to usb drivers. if that didnt work uninstall them then download kies again. if it still doesn't install them, open kies, click menu, reinstall drivers

What is it that you're trying to do?
Sent from my SAMSUNG-SGH-I897 using XDA App

If it is coming up unknown device try another port. You may want to try another microusb cable as well.
Sent from my SAMSUNG-SGH-I897 using XDA Premium App

I've always had luck with the drivers in the captivate aio toolbox. Even on a fresh win7 64bit when I replaced my boot drive with a ssd a month ago.

Samsung really failed at the USB drivers for the Captivate. I would expect to be able to install the drivers from their website. Plug in my phone, and have it working.
trell959 said:
uninstall all of the driver that you downloaded. uninstall kies. then go to samsung.com search for the captivate, choose you phone, click the 'i own this' button. then go to get downloads, software. click on the .zip file icon next to usb drivers. if that didnt work uninstall them then download kies again. if it still doesn't install them, open kies, click menu, reinstall drivers
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I tried that before, didn't work.
bornjamerican said:
What is it that you're trying to do?
Click to expand...
Click to collapse
I'm trying to:
1) connect as a mass storage devices. Yes I know turn on USB debugging and to mount the drive.
2) flash back to stock 2.1 or root my phone so I can install a custom ROM on it. Might go with CM7/MiUi or something from Team Phoenix. So use Odin3
shinji257 said:
If it is coming up unknown device try another port. You may want to try another microusb cable as well.
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Click to collapse
Tried all of the ports on the computers. I don't have another microusb cable to test to see if that's the problem, but I'll check that tomorrow.
Johnnie5000 said:
I've always had luck with the drivers in the captivate aio toolbox. Even on a fresh win7 64bit when I replaced my boot drive with a ssd a month ago.
Click to expand...
Click to collapse
I'm going to try a fresh install of windows 7 32-bit with aio toolbox see if that works.
Tried my friends brand new microUSB cable. It worked.

I have tried 4 known good cables know, 4 different computers and every USB port available on all 4 of the PCs I tried. Only once did it identify the device and install the drivers and I was able to root it but I still can't sideload because after the reboot after rooting it is back to device not recognized/unknown device. This has been a total pain. Any suggestions? I'm not with AT&T any more so I am out of luck for just bringing it into a store and asking them to take care of it.
Edit: Sorry for bumping an older post but I did it instead of starting a new thread.

rmriggin said:
I have tried 4 known good cables know, 4 different computers and every USB port available on all 4 of the PCs I tried. Only once did it identify the device and install the drivers and I was able to root it but I still can't sideload because after the reboot after rooting it is back to device not recognized/unknown device. This has been a total pain. Any suggestions? I'm not with AT&T any more so I am out of luck for just bringing it into a store and asking them to take care of it.
Edit: Sorry for bumping an older post but I did it instead of starting a new thread.
Click to expand...
Click to collapse
If you're just trying to transfer apk files to it for sideloading, you can use a wifi transfer app. I use Wifi File Explorer and it's great. You can connect to your phone via web browser and upload/download anything on the SD card.
Another option is to use an external SD card that you can remove and plug into your computer, transfer the files to it, then insert it back into the phone.
This won't work for connecting to PC apps like Odin, Heimdall, or Kies, but for simple file transfers it works like a charm.
Additionally, regarding other usb cables, you didn't mention what types of cables you used, so I'll throw in another thought. The cables that come with the Captivate don't work on some PCs (like my new iMac). Third-party, generic usb cables might not work, either (I tried some and got a whole lot of fail). The only cable that works for me is the one that came with my wife's Motorola phone. If you haven't tried one yet, I would recommend getting your hands on a Motorola cable and testing it out. You'll immediately notice the cable is much thicker. I don't know if that has anything to do with why it works when others don't, but there's something about that cable that others don't have.

Bad Phone?
Could it be the phone port is having issues?
I've had the same problem and it seems that the port on the Captivate is shot which may be your issue. it will always charge; but tends to cause a lot of profanity when trying to get a PC connection to transfer files or flash it. It will be seen, then immediately play the 'unplugged' sound from windows. I've sat there and had it play the tones of plugged in and un plugged over and over again just by tilting the phone from side to side. No matter what cables I use (tried several but they are all samsung due to the recessed port). If it establishes the connection; I have to be very still with it or it'll lose it. If it loses it; I get unknown device messages or not functioning messages on that port until I reboot the PC.
Trying to flash anything via ODIN takes a lot of patience.
Those same cables / USB ports are used on my wife's Focus without ever having a problem. I wrote it off as too much flashing / overclocking of my phone but am not sure.

hi i was having this issue as well. i solved it by:
1. download a good & stable miui rom, rename it to update.zip and place it into your sd card. i took the sd card out of the phone and used a adapter to connect the sd card to my PC since i can't access my sd card through the usb port.
2. put the sd card back into my phone, turn off my phone. press and hold volume up and down buttons, then press n hold the power button till the screen shows something.
3. select install from sd. wait until the installation finishes and select reboot the phone.
4. when you're in your new miui rom, try to connect your phone to the pc via usb port again.
this worked like charm for me.
about the miui rom, i suggest you to use the one from miuiandroid.com (the UK version)
after flashing the rom im able to connect via usb and use mass storage.
hope this helps

Also, when you uninstall drivers, don't forget to look in the program files for anything that may have been left behind and delete it.

From the description it sounds strongly like you are actually experiencing a port failure which is common on the Galaxy S devices. PM me if you need this repaired...

Only try another usb cable, i bricked my cappy with a bad contact cable on odin, unknown device too, new cable=i897 device on windows notifications
try and feedback!

strange, this only happened to my when i soft bricked my phone. try connecting it to your computer in download mode

I had this issue once before. Here is what I did which resolved the problem. I was using a windows 7 PC
1. Download the ADB kit and extract it to C drive.
2. Connect your mobile to the PC on USB port
3. Wait for the drivers to be installed automatically (it might give you a failed to install message)
4. Never mind that message. Open Device Manager
5. In Device Manager, if you expand the "Universal Serial Bus Controllers", you'll see a device that has yellow question mark against it. This is your phone and since drivers are not installed properly, it has the question mark.
6. Right click that device, and select "Update Driver".
7. IN the window that comes up, select "I'll select a driver".
8. Browse to the folder where you have extracted the ADB kit on C drive
9. Check include subfolders and click Next.
10. The drivers should be be installed and your device should be identified by the computer.
Let me know if it works for you.

[Q] Problem connecting through USB

Hey guys, I have a galaxy 3 with CM7 (kyrillos release) and I'm having a problem when using the phone to transfer files...
When I connect it to any PC without Kies, windows start searching for drivers, but it doesn't find anything, so the phone isn't recognized, and I can't transfer files...
In my pc, with Kies installed, I connected the phone and windows started searching for drivers and found, installed them and it's working fine...
So, what could be done to connect the phone sucessfully in other PCs without Kies?
Thanks

just install kies , it contains some drivers for your sd so the pc can see the sd..otherwise you could use a card reader and connect you sd straight to your pc/laptop

or else got to this thread and download the driver directly

There is no way to get USB storage working without downloading any files?
So I would need to carry with me a pendrive with the driver?!

yes if you don't have internet connection. All usb devices need a driver...

but when I put a pendrive, windows find the driver... but, when I put the phone, windows does not find

there are a few thousand drivers preloaded in windows to increase support out of the box for many devices, it's impossible to include every driver though
i think pendrives use a generic driver anyways

reflash the phone
install adb drivers for samsung in your pc
connect your phone to pc

u can find a small driver pack from google with only 10+m
Sent from my GT-I5800 using XDA App

I think there is no way to conect the phone to pc using cable without installing the drivers. But there is an app that can help you on your purpose, it's the AirDroid, you can find it in the market. With this app you just need to conect to the same wireless network as the computer you want to transfer files, and you're able to transfer files using the internet browser, and others stuff like manage contacts, messages, ringtones, apps...

Win7 Will Not Connect To Xoom

I just got a new Win7 Pc and now when I try to connect my Xoom to it it says Unknown MPT device. I tried installing the drivers to no avail. I didnt have this problem on XP. I am running stock ICS on my WiFi Xoom. Any ideas?

Where did you get these drivers from? Try the ones directly from Motorola.

You could drive removing the current drivers and SW. Try just using the device then runnign the moto install for those drivers. Make sure USB is enabled correctly on the tablet too. Is it charging from the usb connection? You could try a different port it shoudl charge regardless.

drew4452862 said:
You could drive removing the current drivers and SW. Try just using the device then runnign the moto install for those drivers. Make sure USB is enabled correctly on the tablet too. Is it charging from the usb connection? You could try a different port it shoudl charge regardless.
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Click to collapse
Xoom doesn't charge via USB..

I am using the drivers and software directly from Motorola. I have tried it with USB debugging on and off. I have tried switching it from MTP to PTP on the Xoom and still the same results.

bigslam123 said:
I am using the drivers and software directly from Motorola. I have tried it with USB debugging on and off. I have tried switching it from MTP to PTP on the Xoom and still the same results.
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Click to collapse
Go into device manager and see what's up. Make sure xoom is plugged in beforehand. Right-click My Computer -> Manage -> Device Manager.
If there are no errors (!) to do with the xoom, then some form of driver is installed. Manually delete these by right-clicking on them.
Then take out xoom, and put it back in. Win7 should automatically find the MTP drivers.

TheStickMan said:
Go into device manager and see what's up. Make sure xoom is plugged in beforehand. Right-click My Computer -> Manage -> Device Manager.
If there are no errors (!) to do with the xoom, then some form of driver is installed. Manually delete these by right-clicking on them.
Then take out xoom, and put it back in. Win7 should automatically find the MTP drivers.
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Click to collapse
I'm getting the same exact problem and I've gone through uninstalling windows media 12 to acquire the mtp drivers and nothing, i can't even get it to install wmp11.grrrrrrrrrrrrr

does the xoom show up in Windows Explorer under "Computer"?

Unable to copy files to Nexus 5

Please help.
I have rooted and installed SuperSu and TWRP on my device.
I tried to connect my phone to my computer, it gets detected and drivers are installed.
When I cannect it as MTP, the drive on the phone does not appear on my coimputer. When I change to PTP, it appears as camera. But I can't copy files to it.
I have tried with another computer with the same result.I have rebooted the computers and I also reset my phone which didn't help.
What am I doing wrong?
Thank you

xdm9mm said:
Please help.
I have rooted and installed SuperSu and TWRP on my device.
I tried to connect my phone to my computer, it gets detected and drivers are installed.
When I cannect it as MTP, the drive on the phone does not appear on my coimputer. When I change to PTP, it appears as camera. But I can't copy files to it.
I have tried with another computer with the same result.I have rebooted the computers and I also reset my phone which didn't help.
What am I doing wrong?
Thank you
Click to expand...
Click to collapse
enable adb in developer options and then connect to your pc, that fixed connection for me

thenobol said:
enable adb in developer options and then connect to your pc, that fixed connection for me
Click to expand...
Click to collapse
if you mean usb debugging, I have already done that...

xdm9mm said:
if you mean usb debugging, I have already done that...
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Click to collapse
Do you just not see the device within you folders? Might be a driver issue, I had some problems with that initially.
Also, I had issues trying to transfer pictures/videos from my PC to the phone as well. IT would start the transfer but started crashing a few times before I was able to transfer everything over successfully. But that might just be a Win 8.1 compatibility or driver issues as well.

skyo12 said:
Do you just not see the device within you folders? Might be a driver issue, I had some problems with that initially.
Also, I had issues trying to transfer pictures/videos from my PC to the phone as well. IT would start the transfer but started crashing a few times before I was able to transfer everything over successfully. But that might just be a Win 8.1 compatibility or driver issues as well.
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Click to collapse
Yes I don't see the device. Maybe it's caused by the old Nexus 4 drivers.. anyway I uninstalled "Android Device" from my computer's device manager, unplugged the phone, then it miraculously installed the drivers... I'm copying mp3's to my phone now.
Thanks

Sounds like a driver issue. Google "Android naked usb drivers" those worked well for me

Phone to Laptop issue

whenever i connect my phone to laptop via the usb cable i keep getting the issue " the connected device is unable to access data on this device.Reconnect the usb cable and try again" have tried this with one two cable same issue .
my phone will charge while connected but the internal or sd card wont show up

OS on laptop?

windows 10

Tried a different USB port?
Test on a different PC too to rule out phone and cables
Check Samsung drivers are installed correctly in device manager

checked on a different pc works on that!!
on mine i have deleted all drivers and reinstalled the drivers but still same error

k****ij84 said:
checked on a different pc works on that!!
on mine i have deleted all drivers and reinstalled the drivers but still same error
Click to expand...
Click to collapse
Well good news that your phone and cables are fine
So something is either wrong with the laptop USB ports, or drivers
Did you check for chipset drivers too?
Last step would be reinstall Windows

yes i think i may have disabled some services?

k****ij84 said:
yes i think i may have disabled some services?
Click to expand...
Click to collapse
Possibly, if you have run any of those Anti Spying programs, they break Windows 10 mostly
Or disabling things in group policy is also a common way to cause problems

yes done had to delete drivers and have disk and reinstall
thanks
also can private mode files or secure folders be saved on media card?