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[Q] usb device not recognized?

Hopefully a simple fix.. When i plug my unlocked captivate in my computer reads usb device not reognized? So then i went thru to try and format this brand new card and it wont let me select format? Im not sure what to do and am stumped. an help would be appreciated

try a different cable. for some reason mine gets recognized about once out of 50 tries with the cable that came with the phone but when i use a different one it works every time.

tried 2.. no change.. more info.. when i plug the usb in.. it says select usb mode..kies, media player, mass storage or pc internet.none seem to make a difference. but it does seem to let me format the card and does make it appear available in the sd card and phone storage?? its very confusing..

I ran into a similar problem 2 days ago. My phone was fine for 30 days and then all of a sudden the usb port crapped out on the phone. I had tried multiple pc's, my mac which doesnt require drivers and then a trip to the AT&T store. Those idiots were a waste of my time but tried to connect it to a box for sucking down phone numbers and it wouldn't connect to to the phone either. I am not sure if its a problem from a rom I installed but sorry to say they are sending me a replacement phone tomorrow.

I wouldnt have belived it but a co-worker said try a different usb plug on my computer.. Im glad it fixed it.. a little humbled but im posting just because it may happen to someone else. Whats weird is the usb port works with every other device?? strange but true story thanks for the responses...

yeah none of my usb ports in front of the comp worked, tried back usb ports and had no issue, also keep in my i had drivers installed before hand.
win 7 x64

all of a sudden i cant get my PC to see my captivate, at all. So now I cant do Odin! tried all the ports and also another computer. Ideas anyone?

Captivate Cant Connect with USB

I've looked everywhere and cant seem to find an answer, so i figured i'd start a new thread.
My captivate used to connect to my computer just fine, but there was another computer it would just NOT connect too! Well, after a few months, it stopped connecting to my home computer as well.
I have USB debugging on, the phone is rooted and everything. When I plug it in and mount the USB drives, i get drives J and K on my computer, one for the internal storage, and one for the SD card i have in the phone.
When double clicking any of those drives, it just sits there and reads forever without ever doing anything. I can use the SDK to run "adb devices" and it see's the phone, Odin One Click finds the phone but freezes on reading file line, or just fails all together.
Any ideas?

Try reinstalling the samsung usb drivers and restart your computer, that'd be my first step.
Sent from my SAMSUNG-SGH-I897 using XDA App

You have to be on the touch wiz home screen if you're trying to connect to Kies, otherwise turn on USB debugging and you should be good to go
Sent from my SAMSUNG-SGH-I897 using XDA App

SeenNotScene: I've uninstalled, rebooted, re-installed several times. I've been having this problem for a couple months now and i've tried everything i can think of. It doesnt work
bkhams: I dont even know what Kies is? I always have USB debugging turned on, and once connected i bring down the drop down menu and mount the USB so i can access my phones files as if they were another drive.

I had the same problem, and Samsung peeps told me I had to use the USB cable that came with the phone, low and behold they were right. Connected right away with the USB that came with the phone, could that be your problem?

I had the same problem in the past and it was actually a hardware problem with the Captivate and not anything with the computer. I ended up taking the phone in and they exchanged it for me.
I do not know if yours could be having the same problem, but that was my experience. Frustrating, to say the least.

Hmm... Could be the hardware i guess.. I know its not the cable though because i've only ever used the cable that came with it.

Have you tried connecting to the USB port directly off the motherboard? My connections were "sketchy" at best when using the ports of the top of the computer case. Once I connected directly off the MOBO, zero problems since.

Sloved!
axis01 said:
Have you tried connecting to the USB port directly off the motherboard? My connections were "sketchy" at best when using the ports of the top of the computer case. Once I connected directly off the MOBO, zero problems since.
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Click to collapse
Thank you for suggestions! My front USB connector is probably connected to some internal HUB, not going straight to the motherboard and wont work. Connecting directly to MB USB solve the problem. I am a little bit surprised... but whatever - M$ bull*hits. I spend couple of hours yesterday to find out whats going on. Thank you again!

usb connection with pc suddenly dead

Hello suddenly my nexus s stopped connecting with data with the pc it only charges, tried with 3 diffrent computers with diffrent os , no menu popping on nexus and nothing connected on the computer(like i didnt connect anything), i removed the battery left it for some time installed stock rom still nothing.It was acting normally for a second and the other it stopped any help appreciated!

Are you sure you're using the cable that came with the phone? I have an LG Wink featurephone here that uses the same connector at the phone end -- its cable will charge my Nexus S (using the computer, obviously, but also when used with either the LG or Samsung charger) but no USB connection happens when I use it. Only the cable that came with my Nexus S provides a USB connection when I connect to the computer. I guess there are pinout differences between the two cables.
If you're sure you're using the right cable, I would guess that it's gone bad if it doesn't work on any computer. You can buy an (overpriced) replacement from Samsung or maybe a cheaper one on eBay or at a retail store. If the latter, be sure the seller lists it as compatible with the Nexus S.

it happened with the original cable ppfff i dont know...

same problem
stavros86 said:
Hello suddenly my nexus s stopped connecting with data with the pc it only charges, tried with 3 diffrent computers with diffrent os , no menu popping on nexus and nothing connected on the computer(like i didnt connect anything), i removed the battery left it for some time installed stock rom still nothing.It was acting normally for a second and the other it stopped any help appreciated!
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Click to collapse
Hi
I have the same problem
I have no idea what the problem could be.
We are not alone with this problem: code.google.com/p/android/issues/detail?id=13553
Now installed stock rom as well but still the same problem.
If i starting the NS in the bootloader mode the phone is not recognized by the computer.
It would be great, if someone knows a solution!

polandy said:
Hi
I have the same problem
I have no idea what the problem could be.
We are not alone with this problem: code.google.com/p/android/issues/detail?id=13553
Now installed stock rom as well but still the same problem.
If i starting the NS in the bootloader mode the phone is not recognized by the computer.
It would be great, if someone knows a solution!
Click to expand...
Click to collapse
I've been trying to get help with this for weeks. No one is even responding to my posts. I thought it was something OBSURDLY simple, such that people didn't even want to waste their time responding to me.

Seeing same problem, No connetion via USB
Posted problem in General,, http://forum.xda-developers.com/showthread.php?t=1104245
Tried different cords, different computers and operating systems,, did cold start several times on phone (removed battery) still no luck, I am running totally stock
Curious do any of you have the Google Music Beta?? (maybe a over zealous rights thing?)
just tried it with a Win 7 machine that had never seen it before and it said it could not recognize the device,, me thinks that the MS device driver DB is messed up buy some recent Win update??

i sent it to samsung to change my usb slot because after connecting to pc and nothing happen when i went to charge the phone it took 5 hours to get to 30% so iam almost sure that mini usb slot malfunctions

stavros86 said:
i sent it to samsung to change my usb slot because after connecting to pc and nothing happen when i went to charge the phone it took 5 hours to get to 30% so iam almost sure that mini usb slot malfunctions
Click to expand...
Click to collapse
My phone charges just fine. And my USB connectivity was fine until I manually installed 2.3.4.

~I had usb connection problems after upgrade to 2.3.4 a bit different but I managed to get the USB back by formatting the SD card.
see here

Acnescar said:
~I had usb connection problems after upgrade to 2.3.4 a bit different but I managed to get the USB back by formatting the SD card.
see here
Click to expand...
Click to collapse
I was on 2.3.3 when this happened, i tried to flash 2.3.4 then and again it didnt work but the strange thing is that when i was moving the mini usb the first times up and down it was shown for a moment as a broken usb device.Then this stopped and was not shown at all on the computer and finally the phone charged super slow when connected to electricity

Beginning to believe that it is a physical prob with USB connector on phone. It seems to start/stop charging when wiggling usb on phone but no mounting. Doe anyone know best way to resolve , T-mobile but bought from Best Buy? so to Best Buy? FOR SUPPORT /EXCHANGE? suggestions?

I've seen loose connections before. My suggestion ain't the cheapest but the plug, on the cable end, shouldn't wiggle. I went to a corporate sprint store, the ones that actually have working display phones, and got their usb to micro usb data cable. The thing with that cable is when you plug it in the phone side, it goes into the jack firmly. You can almost feel the little locking tabs click into place. There should be no play or wiggle with that cable as long as there's no damage or abuse with the jack on the phone. IMO, that's a good data cable. It's never given me problems before.
Also, sometimes the cable is only wired for charging. A true data cable will be wired correctly and be able to both charge and transfer data. Usually the cables that come with the phone are crap quality. I don't know if my suggestion will help but it won't hurt to have a good cable for data transfer and flashing. The last thing you want is a flaky connection from a cheap cable when you're flashing roms. Russian roulette with bricking a phone in a worse case situation.
Did you try reboot the computer and the phone? How about a different usb port? How about unplug any other usb device in case it's conflicting for some unknown reason? It sounds like so many people with windows 7 are having problems. Usually always happens with a new os that's released. Xp, for flashing devices and programming different hardware devices, has never given of a problem. I have a small partition with xp on it just for that purpose only.

off to Samsung for repair for me...
After time on phone with them and a factory reset belief is that the usb connector is defective. BTW Best Buy just hands off to Samsung 1-800 #
So Back to a barely functional G-1 for a while, glad I could find it!

So is Samsung or the carriers replacing or fixing units?
My USB data died shortly after 2.3.4 ota update.
Wifi FTP is fine for data transfer but I want USB debug to work...
Shame on google and Samsung, this bug has been around for months.

no shame on anyone...
I went through a factory reset with Samsung on phone that isolated the problem to what is apparently a loose usb connector, nothing to do with software... only hassle is sending it in for repair, as` mentioned problem needs to be dealt with Samsung customer service (not carrier or Best Buy), they were fine on phone...

Can't connect to pc-USB not recognized, unknown device

I have been searching for about a week now and still can't figure this problem out. I bought this phone used about a month ago and I haven't tried to connect it to my pc until just recently. I am wanting to root and unlock my phone but I can't connect to pc using usb cord although it will charge it.
I am on GB 2.3.6 vuvkj6, stock.
I have tried 4 different usb cords, 4 different pc/laptops and all usb ports. I have also installed and uninstalled several usb drivers with no luck.
My phone can only get into download mode using a jig. Even in download mode, I can't connect to pc. I have tried using Heimdall, Odin, and kies but it just does not connect.
If I can use a jig to get it into dl mode, does that mean the phones usb port is fine?
I just want to be able to connect with pc. Is it possible to flash using my sdcard? I am thinking maybe the phone is missing something to pick up the usb signal or something.
I am lost, any help would be appreciated.

Maybe, I think it's a phone issue.
Do you still have a warranty?

I bought this phone used, so no warranty. If the jig works, does that mean the usb port is ok?

Does the phone charge when plugged in? Have you tried to go ahead and flash even though it says not recognized?

ligitalipeople
Yes the phone does charge when plugged in. I can't flash using Heimdall or Odin. Any other way of flashing?
I have also put the phone into debug mode with no luck.

Have you done a factory reset?

Yes, I have done a factory reset.

FINALLY! I got it to work.

Can you post back here and tell us what you did to get it working in case someone else has the issue?
Thanks and glad you got it going!

I am not sure what made it work for me. But what I did was "clear memory" on ram. I don't remember how I got onto that screen but I clicked on ram and clear memory.
I then pushed the usb into the pc a few times really fast until pc showed somethnig other than "usb device not recognized". Pc then started to show device connected.

if you are using windows i have found that sometimes the usb ports u used for the phone get stuck to the driver that was there in the first place. So what I do to fix this is go into device manager from the control panel and then uninstall the drivers for the specific port that I am trying to use. While keeping my phone unplugged from the computer I then reinstall the samsung drivers, restart my computer and then try to plug my phone in. 90% of the time that has been what works for me.

Ok, I figured out the problem. It has nothing to do with the drivers or clearing ram memory. My problem is the actual micro usb connection. If is a little loose from side to side and when I push it to one side, it connects no problem.

That is the exact same thing that happened to my wife's phone... luckily it was still under warranty...
Sent from my SGH-T959V using Tapatalk

My phone is out of warranty. At least now I know the problem. It was extremely frustrating trying to figure it out.

[Q] Usb port issues

hello ,
let start off by saying i liked this phone until i started having problems with it ..
so a few months ago i after the usb port not working as a (media device) with cm10.1 &10.2 for a year delt with it ... i have no mtp or ptp options not even upon plugging it in dose not even acknowledge it just beeps then windows 7 usb device not recognized until i re flashed jb 4.1 and it worked again windows 7 seen it as a media device and i was able to tether until a few days ago and it with no warning it will not let me see it kies dose nothing just says usb device not recognized and dose the same as it did with cm10.1 i have flashed and wiped a few times no change i would like to tether and get my files on and off my wife has the same phone no issues ..??? but what i don't understand how can it work well for a few months then not ..? can the mount points in the phone get corrupt ? seems like its just the phone because my wifes tethers just fine mine wont she is stock jb .. i have a rooted jb .. thats it can the usb port just fail .?
when i plug it in it just goes strait to charging on pc and beeps thats it .. tried different usb cords and computers the same thing

The USB port could be damaged or dirty. What happens if you plug the cable into the phone, apply gentle pressure on it towards the back of the phone (Or the front) and then plug it into the computer? Does it start to work so long as the cable is held? If so I would guess the USB port may have developed some bad solder joints.

yeah tried everything
Jax184 said:
The USB port could be damaged or dirty. What happens if you plug the cable into the phone, apply gentle pressure on it towards the back of the phone (Or the front) and then plug it into the computer? Does it start to work so long as the cable is held? If so I would guess the USB port may have developed some bad solder joints.
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Click to collapse
it just charges but wont recognize anything sorta been like that since i first owned it .. its been spotty but now nothing at all .. thinking about replacing the usb port in the phone seen that egay sells em for 10 bucks .. i do have insurance on it still thinking about doing a replacement