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I've tried 3 different cables on 3 different computers and it hasn't worked on any of them.. 2 cables are Samsung and 1 was a blackberry cable. All 3 computers are windows XP. Could that be the problem?
Sent from my SPH-D700 using XDA App
No I don't think its XP. Did you find the epic drivers and install them?
Sent From My Evo Killer!
Of course haha
Sent from my SPH-D700 using XDA App
Are you plugging the cable into just any USB port?
Computers usually have like 6 or more usb ports... Usually only two of them are the primary. The rest are technically a USB hub.
On a normal desktop tower, you want to plug your phone into one of the USB ports immediately adjacent to the network port. They are usually side by side, Network jack, and 2 usb next to it.
You may have to look up how to clean uninstall the samsung driver, then reinstall it before you ever plug your phone into your computer. Then you want to always plug it in the same spot. USB ports often act like individual devices. Even though the driver is installed, and your phone may work on 1 usb port, moving it to another port, it may fail to recognize it.
This may be a setting on your phone, or it may be a setting on the pc. Also, when mounting and unmounting your phone, make sure you use Windows XP safely remove hardware, or the unmount option from your phone to prevent it from failing to recognize at a later date.
Wow ill have to try that later, thank you for the info.
Sent from my SPH-D700 using XDA App
If that still doesn't work, I rebooted the comp while still in usb storage on my phone, which finaly made it recognize... good luck to you though!
Sent from my SPH-D700 using XDA Premium App
Make sure your USB debugging is off I had to turn it off for some ROM's I don't know why but I did. Also If that don't work go to the market and download "Multi Mount SD-Card Lite" This worked like a charm for me especially the widget, but for the free version you can't have Ad Blocking on.
Same thing happened to my Hero back when I was first learning how to root the thing. Outside of computer and cable problems, it has to be your phone. I have to ask though, is it at least charging when you plug it in?
I've tried everything I can possibly think of. I have an Asus Laptop with Windows 7 64 bit and absolutely cannot get my Epic to be recognized. I've uninstalled and re-installed the driver more times than I care to mention. I've tried mounting the device to no avail either. I've tried plugging in the phone into each of the USB ports on the laptop to no avail. I need to get the computer to recognize the device so I can get odin to recognize the phone so I can flash back to stock. Right now it doesn't do so. Does anyone have any ideas of what I can do to get this up an running?
Try installing the 32-bit drivers even if you're on a 64-bit computer....
The same issue comes up. It says that the drivers are not successfully installed (even though the installer goes through) and it says "Unknown Device" over and over.
Are you removing previous drivers?
then rebooting before installing new drivers...
also are you using stock cable?
if so buy a new cable you can get cheap ones online for like a dollar just search micro usb cables
Yes, yes, yes. Does the cable really make that much of a difference? I saw that people have had issues but I mean it charges properly all the time so I figured it was ok to use.
Absolutely!!!!!!!!!!!!!!!!!!!!!!!!!!!1
That cable is worthless get a Blackberry cable they are very durable and dependable.
i was having problems also..... all because of the cable.
I'll probably go buy a cable from Walmart, order a cheaper one online from Monoprice and return the other just so I can odin my phone...I really hope that's the issue though.
sporkisfaster said:
The same issue comes up. It says that the drivers are not successfully installed (even though the installer goes through) and it says "Unknown Device" over and over.
Click to expand...
Click to collapse
does it keep looping "unknown device" in the corner, almost like you unplugging and plugging back in repeatedly?
ifso try cleaning the contacts of the usb port on phone and on the small end of the cable.
if not then try totally uninstalling the drivers you installed and if possible when its saying "unknown device" open the device manager, r-click then unistall in there.
USBDview has always been able to dig me out of the home when ive had usb related driver issues... just run it and delete/uninstall anything samsung/android/adb etc related, reboot pc and phone then try again...maybe even redownload the drivers
http://www.nirsoft.net/utils/usbdeview-x64.zip
http://firon.net/xda/usb_drivers_GalaxyS_x64.zip
update (you replied as i was typing): one bandaid for the cable you could try for now is to take a needlenose pliers or something and slightly squish the micro end to try getting a tighter fit.... i had to do that to the cable i keep at work.
You can always just download kies. That's what I did. When I was trying the standalone drivers I had trouble. Installed kies on both of my laptops and coding works beautifully everytime. And I seriously think you guys are ill. Its a cable... its digital. It either works or.it doesn't. I use my samsung wire exclusively. Its thin and I like contour on the plug. Both cables have worked flawlessly on both of my epics.
Sent from my SPH-D700 using XDA App
RushAOZ said:
And I seriously think you guys are ill. Its a cable... its digital. It either works or.it doesn't.
Click to expand...
Click to collapse
You are wrong.
Cables can have breaks in them which give them intermittent connectivity. Also, since this cable has several (5 I think?) single strands of wire in them, a single wire could be screwed up causing this (or the pin for a single wire on either end) That would still allow it to charge, and partially be recognized by Windows, but not allow it to fully communicate causing this problem.
I have a cable that I only use for charging because it has this EXACT problem. Another cable works perfect, but this particular cable gives me the unknown device.
sporkisfaster said:
I've tried everything I can possibly think of. I have an Asus Laptop with Windows 7 64 bit and absolutely cannot get my Epic to be recognized. I've uninstalled and re-installed the driver more times than I care to mention. I've tried mounting the device to no avail either. I've tried plugging in the phone into each of the USB ports on the laptop to no avail. I need to get the computer to recognize the device so I can get odin to recognize the phone so I can flash back to stock. Right now it doesn't do so. Does anyone have any ideas of what I can do to get this up an running?
Click to expand...
Click to collapse
look up and install pdanet. Pick samsung and let it do it's thing.
you're good after that.
Milkman00 said:
You are wrong.
Cables can have breaks in them which give them intermittent connectivity. Also, since this cable has several (5 I think?) single strands of wire in them, a single wire could be screwed up causing this (or the pin for a single wire on either end) That would still allow it to charge, and partially be recognized by Windows, but not allow it to fully communicate causing this problem.
I have a cable that I only use for charging because it has this EXACT problem. Another cable works perfect, but this particular cable gives me the unknown device.
Click to expand...
Click to collapse
Right.. so it either works or it doesn't lol if both cables are in perfect working condition then there would be no issue. Its all preference. I personally use a blackberry micro usb cable. It locks in to the usb port on the phone better. Just so im not paranoid about the wire coming off while flashing... cuz thats bad lol
Sent from my SPH-D700 using XDA App
RushAOZ said:
Right.. so it either works or it doesn't lol if both cables are in perfect working condition then there would be no issue. Its all preference. I personally use a blackberry micro usb cable. It locks in to the usb port on the phone better. Just so im not paranoid about the wire coming off while flashing... cuz thats bad lol
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
I didn't articulate myself clearly, but that is my fault.
If a single wire inside the cable is broken (for the sake of simplicity let's just say it is the RECEIVE cable - from the device to the PC). The PC can recognize that there is a device there, but because the device can't talk to the PC, Windows can tell there is something there, but has no idea what it is since the device can't talk back to the PC. Also, in this scenario the cable would charge just fine since those individual lines are intact.
RushAOZ said:
You can always just download kies. That's what I did. When I was trying the standalone drivers I had trouble. Installed kies on both of my laptops and coding works beautifully everytime. And I seriously think you guys are ill. Its a cable... its digital. It either works or.it doesn't
Click to expand...
Click to collapse
1st off u sir, ARE WRONG.... Maybe when it comes to HDMI Cables but not for these phones.
sporkisfaster said:
Does the cable really make that much of a difference? I saw that people have had issues but I mean it charges properly all the time so I figured it was ok to use.
Click to expand...
Click to collapse
To quote u "Yes yes yes" it does make ALL THE DIFFERENCE... I had the same problem and made serveral posts about it when the phone 1st came out, I tried everything... Uninstalled/Reinstalled/Rebooted many times, Manually deleted the folders where the drivers are held then Re-installed, Installed Kies (which is a P.O.S. and was a BIG WASTE OF TIME imo.) I tried everything and just about gave up until 1 day i looked @ my roomate and asked him 2 let me borrow his cable to his cheap cricket phone 2 see if it would make a difference.
Well it worked... Get a new cable, if you've done what ive done and it still doesnt work, its the cable and not the drivers
I've done just about all I freaking can on this as well.
I've installed, un-installed, and re-installed the drivers. I'm running Windows 7 64 bit on Bootcamp.
I've used USBDView, I've uninstalled all of the connected drivers. They get re-installed, but the phone keeps keeps coming up as an Unknown Device. I try and locate the Samsung USB drivers directory, but it keeps coming up as Unknown.
Does anyone know specifically what directory I should use choose when trying to manually link the driver in Device Manager? I'm having a ***** of a time here.
Anybody have any ideas for me? Thanks.
I had the same problem. Buy a new cable from monoprice. The second I bought a new cable for my 64 bit Asus laptop it worked.
Trust me, buy a new cable.
Sent from my SPH-D700 using XDA Premium App
my solution for odin
sporkisfaster said:
I've tried everything I can possibly think of. I have an Asus Laptop with Windows 7 64 bit and absolutely cannot get my Epic to be recognized. I've uninstalled and re-installed the driver more times than I care to mention. I've tried mounting the device to no avail either. I've tried plugging in the phone into each of the USB ports on the laptop to no avail. I need to get the computer to recognize the device so I can get odin to recognize the phone so I can flash back to stock. Right now it doesn't do so. Does anyone have any ideas of what I can do to get this up an running?
Click to expand...
Click to collapse
I had the same problem. I didn't follow directions to solve my problem in Odin. I had to start Odin and plug my phone in and quickly put the phone into download mode. I did that a few times and finally got it to recognize. With Syndicate, it now recognizes every time. I say that now. LOL
This is how I fixed this problem. After doing all I could think of, uninstall, install, system restore, nandroid restor to when phone was being recognized... all these didn't work for me. I still got the same unknown device in device manager.
The fix: with samsung epic drivers already installed. Turn the phone on, plug into your computer. Let device manager find unknown device. Power off the phone. Boot into recovery. Pc will recognize your phone as samsung android device. Reboot your phone and you should be good to go. Hope this works for the rest of you. Good luck.
Sent from my SPH-D700 using XDA App
boy143878 said:
This is how I fixed this problem. After doing all I could think of, uninstall, install, system restore, nandroid restor to when phone was being recognized... all these didn't work for me. I still got the same unknown device in device manager.
The fix: with samsung epic drivers already installed. Turn the phone on, plug into your computer. Let device manager find unknown device. Power off the phone. Boot into recovery. Pc will recognize your phone as samsung android device. Reboot your phone and you should be good to go. Hope this works for the rest of you. Good luck.
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
Isn't the original issue that the driver install fails? not that the device isnt being readed?
Whenever I plug my phone in my computer I get USB Unrecognized device. I ahve tried a few different cords and also whenever I plug my phone into my computer my touch screen doesn't work very well.
Please help
Try downloading the epic drivers for conputer
Search aroud for it
Idk where it was
Sent from my SPH-D700 using xda premium
Already downloaded those and still nothing
Maybe you got a bad device
Is it new
Did you try another comp
Sent from my SPH-D700 using xda premium
I had a similar problem. If multiple cables do not work, I had to Odin back to stock and bam everything was fine again. This will only work if Odin can see it, which mine did but would not when the phone booted up. Hope this helps.
http://forum.xda-developers.com/showthread.php?t=1052813
jaculop said:
I had a similar problem. If multiple cables do not work, I had to Odin back to stock and bam everything was fine again. This will only work if Odin can see it, which mine did but would not when the phone booted up. Hope this helps.
http://forum.xda-developers.com/showthread.php?t=1052813
Click to expand...
Click to collapse
I had this happen to me with srf 1.2 and its doing it again now, I can't use stock cable for anything other than charging. When I connect to a computer it says the same "unrecognized device" but when I use a thicker blackberry cable everything works fine.
Sent from my SPH-D700 using xda premium
It's the Cable.
I have issues getting my Epic recognized as well, but don't fret.
The stock cable will still work, you just have to give it more chances to recognize.
When you install drivers, they don't always go through on every usb port your laptop/desktop have. some ports will work better, like on-board powered ports.
I assume you know your computer better than anyone else and already know which usb ports never fail you and which ones are a little iffy.
Factors aside, wether you be on xp, vista, or windows seven, or even Windows 8 beta... LOL. Open up device manager.. if your 'unknown device' (your epic) is connected, leave it that way, and go down to the usb ports section of device manager. click down on the arrows and you'll find 'unknown device' that's your epic. Right click, uninstall.
now, do the following.
If you're trying to flash/odin.. make sure your SD card is out. as you want your phone to be recognized for a modem, not a usb massive storage, but if in fact what you're going for is the ability to browse through your phone's sd card with your phone connected, then obviously leave the sd card in.Disconnect the usb cable from your pc's end. Make sure your plug is completely inside your phone's micro-usb port. Now, either try the same port again, or choose a different one, do realize that your computer will have to 'recognize' your phone and install the drivers installed on your computer for each new port you try it on. You'll eventually realize which port works best and get full recognition, just give it a little time and patience and you won't be dissapointed. Old Windows XP takes a little longer for usb recognition than windows vista or snappy windows seven. Cheers and i hope i was of any help to you or anyone else browsing around. =]
My Nexus is stock but it is unlocked.
I have the latest CWM on there (touch 5.8.0.2)
I was currently downloading all the necessary stuff to flash to AOKP but havent even got there yet because all of the sudden my USB isn't working.
I have tried two different cables, the stock one and a different one (both which were working before).
I get charging working through USB but no file transfer.
I just did a wipe data/factory reset and wipe cache via Recovery, and still nada.
Am I cooked here? B-stock with no warranty from Expansys, now currently kicking myself for not buying brand new.
[edit] yes MTP and USB Debug were/are both checked on
[edit2] a lot of my searches seem to indicate that you can move and transfer via adb in recovery or fastboot while having this error. I am not finding that to be the case.
[edit3] windows 7 does not show any indication of a usb drive or anything plugged in as it used to before. This is obviously making it hard for me to try things like reinstalling drivers and whatnot.
thanks
It probably has nothing to do with the USB port...
Plug your phone into your computer, and then scroll the status bar down. You should see a notification "Connected as xx" Select that, then make sure connect as MTP is checked, if it's connected via ptp (camera) it won't allow you to sync files, for what reason so ever...
If that doesn't help, then reflash stock ROM, that usually helps.. With most problems anyway...
If both of these don't work, then I'm sorry, but I can't help you. I'd then call Samsung, and send it in...
LG Simon
Yea MTP was already checked on. USB debugging being on would have auto kicked in as well.
I flashed AOKP but still the same issues. The hardware might have gotten bonked - I hate how fragile these tiny little ports are!
Is there some kind of diagnostic I can run to see if it is truly a hardware issue?
It's the kernel, try another one
Sent from my Galaxy Nexus using xda premium
Just swapped to Faux kernel... still persists.
I'm really starting to think its the hardware but crossing my fingers there's a fix.
the same thing is happening to me, it started yesterday too!
I am on AOKP b-23, Faux kernel....
plug in my usb, it can charge but absolutely nothing happens on the computer side, try it on number of computers too... but the phone is able to charge.
EDIT:
try this:
http://forum.xda-developers.com/showthread.php?t=1400034
or this
http://forum.aokp.co/topic/29-aokp-faq-please-give-me-input-i-update-answers-many-times-a-day/
Mine started doing this. Would charge‚ but sometime I couldn't transfer data or use adb. It seems that the USB didn't like to stay in my computer. Any little movement would unplug it just enough to keep it charging but nothing else.
Sent from my Galaxy Nexus using Tapatalk
I've since tested the MHL cable and also tried using the usb host cable to connect a mouse and both work... does that mean my data connection theoretically could be fine?
I'm using AOKP #23 with Trinity and not had this issue at all. Whether it's because I combine the ROM, Gapps and kernel before flashing I don't know but my phone is running fine
im having this problem as well. does anyone have a solution?
So all you guys that are having problems have enabled MTP through Settings >Storage?
Sent from my Galaxy Nexus using xda premium
Had this same issue yesterday ( phone was 1 day old ) had it plugged into my windows 7 machine and all of sudden the machine couldnt see it. So I wiggled the cable sure enough the computer saw it, jiggled it again and it would lose connection to the PC. Tried this on several PCs with Several cables and same result everytime. If I held the cable connected to the phone at the right angle it would never lose connection.
Ran to Verizon and the numbskull behind counter tried telling me that is normal and I would just have live with it, almost punched him in the throat. Demaded he go get another phone and show me if that one does it. It didnt so he swapped it and was to hasty about it, ended up giving me another cable charger and headphones WOOT WOOT
new phone doesnt do it as of this writing
See http://forum.xda-developers.com/showthread.php?t=1427539 This is probably the issue you guys are experiencing. Seems like you should swap it in or try to fix it yourself by changing the USB charging board.
settings/ storage/ menu button/ usb computer connection/ MTP make sure mtp is checked
this worked for me
Sk00bs said:
settings/ storage/ menu button/ usb computer connection/ MTP make sure mtp is checked
this worked for me
Click to expand...
Click to collapse
i'm an android dev and this has happened to me. really really not good to no longer have adb access to my device. restarted both the phone and computer and tried a different coworker's computer and usb cable with no luck.
i used a samsung usb charger last night which i usually never do (i usually just charge it on the computer) and now this morning i have no data connection.
Hello,
have this problem already on my GNEX. After some reading, i got an idea to turn off Fast Charge in Trickster MOD.
And MTP now working .
Anyway there is an warning about fast charge - " Enabling this will disable access to phone storage" .
Problem solved
Yes, i can't connect mtp too and you rigth..usb fast charging is the problem.
Sent from my Galaxy Nexus using XDA Premium App
kymlalu said:
Hello,
have this problem already on my GNEX. After some reading, i got an idea to turn off Fast Charge in Trickster MOD.
And MTP now working .
Anyway there is an warning about fast charge - " Enabling this will disable access to phone storage" .
Problem solved
Click to expand...
Click to collapse
creco said:
Yes, i can't connect mtp too and you rigth..usb fast charging is the problem.
Sent from my Galaxy Nexus using XDA Premium App
Click to expand...
Click to collapse
Just so y'all know...Fast Charge is simply tricking your phone into thinking it's plugged into an AC outlet...rather than a USB port.
Thus MTP won't work.
same issue here
I'm having the same issue here. Charging works fine with 2 computers and multiple USB cables (as well as AC and car charger adapters), but data transfer has completely stopped working. My computer won't see my phone at all. I have the correct drivers (given that I used them to connect to my computer when I first rooted and unlocked the bootloader). Tried changing the drivers, but I can't get my phone to show up in Device Manager at all. MTP and USB Debugging are enabled.
The only thing I can think of is that I dropped my phone while it was connected, and now the USB cable only charges the phone if I bend it in a certain way (it usually requires upward pressure where the cable plugs into the phone to work). However, other USB charging cables work just fine without any pressure. Is there any chance that a new OEM Samsung USB cable might solve my problem? The other cables I've used weren't OEM.
I normally use a wi-fi data transfer app because the USB data transfer has been slow since day one, so that can be worked around. What IS a major problem for me is that I'm trying to re-root my phone after my root access was lost with the 4.0.4 OTA update. I didn't keep up with the news and only realized last week that my root access had been lost because I tried to do things that required root. Since the OTA update trashed my CWM recovery image, I seem to have no way to re-root and reinstall CWM aside from going back to my computer and doing what I did the first time. But if I can't connect to my computer, I can't do that. It also seems that I would need computer access to remove root in case I bring it back to Verizon for a replacement under warranty.
So on another note, if you guys know of a way to re-root my phone without connecting it to my PC, I'm all ears...
xfighter1188 said:
im having this problem as well. does anyone have a solution?
Click to expand...
Click to collapse
I have run into a lot of USB defects on the phones I have received. It might be wise to get Samsung to repair it, but you will be without a phone for a week. You could also try another cable.
I used to have similar issues except where the power got routed into the data port, frying my phone in multiple areas.
On Samsung's repair ticket they said REPLACED COMPONENT (I'm assuming this is the usb controller and port) this could be the solution but it requires sending it in.
Long time lurker, finally joined up. Had realized this was a problem for a bit. But, I would like to root my phone and with it not recognizing, I'm not seeing how it's possible. Tried all the normal things, restarted computer (MBP 17") restored phone to factory settings, tried different cables, played with all the different default connection settings, turned usb debugging on and off. The phone just charges, nothing shows up to choose connection type like it used to. The GF's Evo3d works fine. Tried doing some research to see if there are different drivers for the mac on the regular evo4g vs the 3d, and it doesn't appear to be. Kinda at a loss of what is going on. It is possible that the pins inside the usb on the phone are damaged?
Any direction would be appreciated.
Thanks
Steve
If there's no way for me to figure out how to make it recognize, is there a way to root and install a custom rom or ICS without manually connecting it...ie wifi?
Just as a basic troubleshooting step, you might consider trying to connect it to a different computer.Or test using a different cable.
And yes, USB ports do fail on Evos sometimes.
Sent from my PC36100 using xda app-developers app
NxNW said:
Just as a basic troubleshooting step, you might consider trying to connect it to a different computer.Or test using a different cable.
And yes, USB ports do fail on Evos sometimes.
Sent from my PC36100 using xda app-developers app
Click to expand...
Click to collapse
Tried multiple cables with my laptop and GFs...starting to think it's the actual micro usb connector in the phone. Her Evo3d works on both computers and with several cables...mine doesn't with any. May try to complete it by accessing the files through bluetooth...not sure if that's a good idea or not though