Database Users

USB not recognized

When I plug my phone into my usb port I keep getting an error message
That says
USB device not recognized
one of the usb devices attached to this computer has malfunctioned and windows does not recognize it. For assistance in solving this problem, click this message.
So when I do that it says unknown. I know I have the drivers installed because I can odin back to stock. I am thinking this is the reason why wired tether will not work.
Can anyone let me know what the problem may be?
Thanks.

This has happened to me from time to time. A reboot of the pc and phone has always fixed it.

I just realized I have never used this cable with the phone. I got it at walmart and it is made by fuse. So it could be the cable.

Also try a different usb port. Mine got error error messages on some ports but not the other on the same computer.

I bought several usb cables for cheap online. 1 totally stopped working, and another one disconnects the phone is I move the cable.
I always suspect the cable!

I am having the same problem with my laptop atm...
My computer can't seem to see the epic when it's in d/l mode. I've installed the samsung drivers as well...but no go.
Hopefully someone has a suggestion to fix the problem. I'll be seaching the forums in the meantime.

had the same problem try a different usb port aslo dont use usb multi hubs.

I have the same problems as well.
A reboot fixes nothing.
None of my ports work.
I do not want to replace my epic but this simple issue is nerve wrecking.

I have a similar problem. Both my wife and I have the epic. I have no issues connecting my phone to either of our computers but when I connect my wife's epic neither of the computer's see the phone at all (not even as an unrecognized device). The phone asks if I want to mount the sd card and I say yes and nothing happens. I've tried usb debugging and I can't get Odin to work either for hers (fine for mine). Has anyone else had this issue?
Thanks

Computer not detecting phone through USB at all!

Argh, I am pulling my hair out trying to solve this! When I connect my phone through USB to my computer my phone detects the connection but my computer doesn't respond at all! I bought the phone used and it is already rooted but is using a pretty old rom and I wanted to upgrade it. It is currently running "Kernel version: 2.6.32.9 [email protected] #4".
Things I have tried:
Using different USB settings on the phone (Kies, mass storage, ask on connection)
USB debugging mode
Different USB cables
Different computers
Cleaning the micro usb port on the phone
Formatting SD card
wide data/factory reset
Nothing seems to accomplish anything, it still reacts in the same way.
Any help would be greatly appreciated!

The ROM shouldn't count.
First of all, has it ever worked? I just presume you're running on win7: did you installed the drivers as specified in several different tutorials on this forum?
What kind of connection are you trying to establish? tether, usb, kies, other? have you tried any combination possible?

I just got the phone a couple days ago, I have not managed to get it to be detected by anything yet. I have tried it on a couple Win 7 boxes and also a Vista laptop. I am currently downloading Ubuntu just to rule out the OS factor. I have just been using Kies to install drivers although after reading your post I found this thread:
http://forum.xda-developers.com/showthread.php?t=961956
I'll try that and post results if that is what you mean? I have been trying to establish basically any connection at all for the ultimate goal of getting Odin to actually detect the phone so I can flash it with ClockworkMod Recovery and then an ICS rom. The phone detects the USB cable fine and starts charging and puts the phone into whatever mode I want (kies, mass storage, etc.) but the computer has yet to give any indication that anything is connected to it.

Try with the drivers, but be also sure to enable usb debugging to be able to select a different usb sharing when inserting the cable in case you haven't already.

The drivers installation didn't make any difference and I've tried USB debugging and all 3 connection modes (Kies, mass storage and media player), none of which exhibit any response from the PC.
Edit: Posting from Ubuntu now, same exact thing. Phone detects USB connection, and it doesn't matter which of the connection options I choose as the PC doesn't give any indication that anything has been connected to it.

That's really weird. Does Odin3 (which presumably works at a lower level) sees anything if you put the phone in download mode? ) this way you should be probably able to upgrade somehow.
Sent from my galaxys using XDA App

No unfortunately there is no response from the computer or Odin3 when the phone is in download mode and connected through USB.

that's odd and maybe that's not good at all.
I'm starting to think the problem could be hardware related, especially in a situation where odin can't see the phone in download mode (i.e. no software layer is interfering).
Is there any glaring damage/scratch/missing parts on the usb port?
Sincerely, if I could return it I would try that at this point.
Unless someone else has got anything else to try.

I'll take a good look at it under a scope when I go to work on Monday I guess. Thanks for your input, I'll try to update if I find out anything else!

So I took a look at the port under a scope today and discovered that one of the pins (the middle one) in the micro usb port on the phone seems to be completely gone! Not sure what each pin does but I'm assuming that one is probably used to communicate to whatever the phone is connected to...
Luckily I have access to a parts phone that I can take apart for a replacement port so probably tomorrow I will attempt surgery on the phone! Will report back with further progress after I have done so.

Well I'm happy to report that that was definitely the problem! I replaced the micro USB port on the phone today during my lunch break, put the phone back together and plugged it into a PC here. It immediately detected the phone so I'm pretty happy! Guess I'll be trying out some ICS roms tonight when I get home!

that's great, glad you managed you fix this yourself, well done and enjoy your SGS

My Galaxy S4 won't stay connected to the computer via USB

Hey all. Just got my Galaxy S4 today and I was loving everything about it until... right now. For some reason, the darn USB won't stay connected to the computer. It doesn't matter if it's simply plugged into the computer as an "installer" or as a media device. It'll constantly disconnect and reconnect itself, even when I'm not transferring any files.
It's not the my computer/USB ports, either, since I can transfer files between my HTC Thunderbolt and Nexus 7 fine. I've also tested 2 other USB cables and they all behave the same way.
Anyone know what's going on? Did I get a lemon?

No im in the same boat. Was trying ti connect in today. I reinstalled and un installed the drivers about 4 times. Tried un selecting usb debugging in developers menu. Installed kies and used the drivers from it still no good. Used 3 different usb leads. Phone will still charge from pc and even when im installing the drivers again and connect the phone it will say that your new device is ready to use but still cant access phone, it simply does not show up.
Wouldn mind was working 2 days ago fine. Same usb port and all. And the port is fine cause my old s3 still reads from the same port.

snwman said:
No im in the same boat. Was trying ti connect in today. I reinstalled and un installed the drivers about 4 times. Tried un selecting usb debugging in developers menu. Installed kies and used the drivers from it still no good. Used 3 different usb leads. Phone will still charge from pc and even when im installing the drivers again and connect the phone it will say that your new device is ready to use but still cant access phone, it simply does not show up.
Wouldn mind was working 2 days ago fine. Same usb port and all. And the port is fine cause my old s3 still reads from the same port.
Click to expand...
Click to collapse
same problem with me!
every thing ok with s3 but the problem only with s4
please we need help to solve this problem!

Same problem
I have also been dealing with this for a while now. I have Windows 7 64bit and I have reinstalled the drivers many times through Kies and manually. It seems like the problem is getting worse since initially I could do some file transfer through usb if i fiddled with the device (changing usb ports, unplugging it, etc). Now I am hard pressed to get it to show up on the computer through MTP at all.
This is quite annoying since I am developing an android app and I need a usb connection in order to test it. A fix would be awesome.

I just tested on my sister's laptop and it doesn't have this problem. I clicked around the phone, transferred a 10gb movie, and left it plugged in to see if there were any signs of disconnects. None whatsoever. Odd. Maybe Galaxy S4 just doesn't like something with our computers. This is quite annoying.
I have a fresh Windows 7 64-bit partition I installed the other day so I'll test it out on that and report the results later today.

retsnom said:
I just tested on my sister's laptop and it doesn't have this problem. I clicked around the phone, transferred a 10gb movie, and left it plugged in to see if there were any signs of disconnects. None whatsoever. Odd. Maybe Galaxy S4 just doesn't like something with our computers. This is quite annoying.
I have a fresh Windows 7 64-bit partition I installed the other day so I'll test it out on that and report the results later today.
Click to expand...
Click to collapse
I do same thing, it is worked in another computer.
I am already put fresh win 7 but still same problem..

im on xp(retro yeah ha ha) but just a pc i have for my phones and stuff. But i got it working again by flashing my firmware through odin and its back working. Im blaming when i rooted it that it broke but ill see if it happens again
edit: Can confirm pc is now picking up phone. I just flashed the most recent stock rom for my carrier through odin and as soon as it finished updating its prefect now. Might wait another while to root it now and wait for more devs to jump aboard for more roms

snwman said:
im on xp(retro yeah ha ha) but just a pc i have for my phones and stuff. But i got it working again by flashing my firmware through odin and its back working. Im blaming when i rooted it that it broke but ill see if it happens again
edit: Can confirm pc is now picking up phone. I just flashed the most recent stock rom for my carrier through odin and as soon as it finished updating its prefect now. Might wait another while to root it now and wait for more devs to jump aboard for more roms
Click to expand...
Click to collapse
I'm on stock, no root.

Hi
I don't know if it may help but i noticed the usb doesn't work when the phone is locked.
I did check 'stay active while charging' in dev parameters and i never got disconnected again.
Sent from my GT-I9505 using xda app-developers app

Tested it out on a fresh copy of Windows 7 and it still continuously disconnect. What gives?

taargaa said:
Hi
I don't know if it may help but i noticed the usb doesn't work when the phone is locked.
I did check 'stay active while charging' in dev parameters and i never got disconnected again.
Sent from my GT-I9505 using xda app-developers app
Click to expand...
Click to collapse
Oops, missed your post. Unfortunately, it disconnects regardless of the phone's state.

My friend's S4 was doing the same thing on his desktop. Every time he would try to transfer pics the phone would disconnect after a few files.
I tried different things from reinstalling drivers to trying to only copy over a couple of files at a time, nothing worked.
Finally I plugged his phone into one of the back usb ports and transferred over 2gb with no problem and no disconnects since.
My guess is the S4 is a power hog and some usb ports just don't supply enough juice. Try plugging it in to a usb port that comes off a motherboard. Don't use the front ports or usb hubs. Hope this helps someone.

dirrtpoor said:
My friend's S4 was doing the same thing on his desktop. Every time he would try to transfer pics the phone would disconnect after a few files.
I tried different things from reinstalling drivers to trying to only copy over a couple of files at a time, nothing worked.
Finally I plugged his phone into one of the back usb ports and transferred over 2gb with no problem and no disconnects since.
My guess is the S4 is a power hog and some usb ports just don't supply enough juice. Try plugging it in to a usb port that comes off a motherboard. Don't use the front ports or usb hubs. Hope this helps someone.
Click to expand...
Click to collapse
I've been trying all kinds of different combinations of USB leads, phone settings and ports all morning and was just about getting ready to start a new Olympic sport of S4 hurling when I came across this post and plugged my USB straight into the back of my machine and it finally works!! Thank you dirrtpoor for your input - a simple fix, but nevertheless it worked.:good:
I suppose it makes sense that a quad core 1.9Ghz phone would be a power hog.

It wouldn't work on my home PC whatever I tried. Front or back USB ports.
On my dads PC sometimes it would display OK and other times "usb device has malfunctioned" (didn't try the rear USB port)
On my work PC it works fine on the rear ports.

I was having the same problem a few days ago, but then I reformatted the SD card, now everything seems OK.
Even the stock gallery app works now...?!

Guys I was having the same problem. For the life of me I couldn't figure out why suddenly my S4 wasn't being recognized by my computer. I finally went into developer options and noticed a "USB Debugging - Debugging mode launches when USB is connected" was turned on. I de-selected that, connected my phone and now my computer recognizes it again. I hope that helps guys, it helped me.

Samsung S4 sync problem
mgrisan1 said:
Guys I was having the same problem. For the life of me I couldn't figure out why suddenly my S4 wasn't being recognized by my computer. I finally went into developer options and noticed a "USB Debugging - Debugging mode launches when USB is connected" was turned on. I de-selected that, connected my phone and now my computer recognizes it again. I hope that helps guys, it helped me.
Click to expand...
Click to collapse
This may be laughably obvious but I'm a former Apple user, which has it's own dedicated USB connector, so I forget sometimes with the Samsung S4, which has a standard (looking) micro USB connector that I need a USB cable that is enabled for syncing as well as charging...not all USB cords with micro connectors on the phone end will carry the data because I imagine Samsung has made their phone's connector require a different wiring in the cable.
I was pulling my hair out yesterday trying to figure out why the computer wouldn't see the phone..then looked at the USB cable and realized I'd plugged a non-syncing cable in. I tried the cable that came with the phone and bingo, worked like it was supposed to.
Hope this helps, sometimes it's the little things we overlook that drive us nuts.

Any way to connect in master storage with out root.
Sent from my GT-I9500 using Tapatalk 4

Use a different usb cable and usb port. I know it sounds stupid but there has definitely been phantom problems which were solved this way, even with something as simple as adb commands

i have same problem. trying all the way but always with the same result...

Phone keeps auto disconnecting and connecting on PC via USB

I've tried this on a hub and a USB port on the PC itself. The phone doesn't even recognize being plugged in on a USB port.
On the PC itself though, it connects and I can browse the files within for a few seconds and my phone then disconnects itself and connects back right after. And everytime it connects, there's a vibration so it's pretty much non stop vibrations. This is extremely annoying. I can't transfer any files over. Currently using Wireless Storage. Cr*p speeds but at least it gets transferred. Any idea what might be the problem? On a D802, rooted and with TWRP installed.

Mine will do this when charging in the car via USB. If playing anything out gets paused. Sux
Sent from my VS980 4G using Tapatalk

Bump.
Huh i thought i was the only one. My G2 does this too. My PC is pretty old and it was on Win 7 and MTP didn't work. So i formatted my 4yo Win 7 to Win 8.1 and now MTP works. It's definitely much faster than Wireless Storage/OSP/3rd party app but what's the point if it keeps disconnecting.
Another thing is, it does happen to my thumbdrive as well. Just that with the G2 it's much worse until i can't transfer any files at all. So the super slow wireless is the only option.
Any solution? Or do i need to upgrade my PC lol.

Try changing the port. Maybe the usb cord is loose or the port itself. This happened to my S2 after dropping it. Maybe the motherboard was moved inside i dunno and after that it keeps connecting and disconnecting when i plug it,

I think you all suffer from too less power throughput from charger/cable/port.
It's like the same when you do not use the supplied charger but another brand your phone will not fast charge.

I was thinking the same too because it doesn't happen when i plugged the phone on another PC.
So the solution is, unplug unnecessary devices and it shouldn't disconnect anymore. If it still happens, try not doing anything on the pc while data is transferring. At least it works for me.

I am also rooted and the problem only seems to happen when the screen turns off and then locks. If I unlock, it comes back.

same problem
I've used my I9300 on stok ROM, no problem, i've flashed ArchiDroid V2.3.4, and the problems apeard. conecting the phone to pc via usb, it connect's and deconnect's, i'm not able to copy anything to/from phone. I guessed it was a problem with the ROM, so i've flashed Resurrection Remix® 4.4.2 KitKat , but the same problem....don't know what's the problem...a little help pleeeeeaseee
PS: changed the usb cable(cord), the usb port, uninstall the drivers and reinstall them...
(off topic...who copied who on ROM...archidroid<->kitkat)
C'mon....i like archidroid...but i need the usb connection 2 PC, i can't live without it

Problem fixed.
I had exactly the same problem as this, I tried different USB slots (even USB 3.0), I tried resetting the phone several times but still it didn't work.
But after changing the charger back to my original iPhone one, it worked perfectly! Probably isn't that wise buying cheap chargers online tbh http://forum.xda-developers.com/images/smilies/tongue.gif

Pleeeease help me get USB capability back!

I m on Verizon vs980. phone operates just fine, but I have no PC connection capability. when I plug to PC , it just charges. its not recognized AT ALL. nothing in device manager or adb. I have updated drivers, usb debugging enabled, and have pc connection setting set to MTP (in fact I have have tried all options). USB on the go does not work either, so it seems like a kernel issue. its like that portion of usb is just not delivering any kind of signal. To help diagnose the problem I reverted back to jelly bean stock 12b, and baseband 12b , thinking if its kernel , it may fix it... same issue. next idea is hardware so I replaced the usb motherboard (not the main board). same issue. I have tried 5 different usb cables, and even used another phone to see if that phone could connect (eliminating possibility of faulty usb on my pc) the htc phone connected fine so I am exhausted on options. seems software related, but I have no idea what to try next. hopefully someone can give me some advice. thanks!!

also just noticed USB debugging option, doesn't survive a reboot. when I turn usb debugging on, its unselected again when I reboot. wonder if this is why, maybe its never really turning on.