Database Users

[SOLVED] HELP! Windows can't recognize the phone anymore

This is a new problem for me.
After successfully sorting out all the troubles of connecting SGS to KIES, and been using it happily for almost a month, now I'm facing another trouble which is quite big this time.
Windows Vista (32-bit) and Windows 7 (64-bit) are now can't recognize the phone when connected through the USB. Got a message says the USB Device/Hardware Is Not Recognized.
I'm using the SGS original cable. The cable was working perfectly and now suddenly it doesn't work in data mode but still able to recharge the phone battery.
Am I having a cable problem? Or worst, the USB connector (on the phone) problem? I tried to clean the USB connector on the phone but still can't connect the phone to my computers.
Does anybody here having the same problem as well?

I just gave up with my PC, same problem
In then end I set up a VMware XP machine to sync
Else I use my laptop
Sent from my GT-I9000M using XDA App

I sometimes have a problem with KIES detecting my phone. What I sometimes have to do is connect the phone with KIES loaded, go to device manager, show hidden devices then uninstall the phone (sometimes has error on device, sometimes not) then disconnect then reconnect phone.
Such a faff but using KIES to check for firmware update lol
This may not help ya but worth a thought, Im on Win7 64

I did not have any problem connecting the phone to KIES, I was able to upgrade the firmware from JF4 to JG4, and been a happy SGS owner for a month now.
But yesterday I suddenly can't connect the phone to any computers. My laptop (Win Vista 32-bit) said that a USB device connected is not recognized. I reinstall Kies in my laptop and same thing happen. Then I switch to my PC (Win7 64-bit), USB device not recognized also appear. Reinstall Kies, still no luck.
What I just realized is that there is NO USB Indicator in the SGS notification bar!
Does that mean that the USB connector on the phone going bad?
I still able to recharge the battery but the USB icon dont show up.
I am now seriously considering the quality of Samsung Galaxy S! Way too much problems for average owner, and even for savvy owners this is just over the top!
What should I do now?

Find another computer or install VMWear and see once and for all if its your phone at fault. Also worst case do a factory reset. If no go then you might have a hardware problem. You could always try Mass Storage mode and see if you can mount the phone as external drive. Its not really the phones fault but I would say its KIES, its just a piece of ****. I have never been able to connect to it using 3 computers and I would say I know what i'm doing since I work in i.t. Also did you replace your Launcher recently? As KIES needs TouchWhiz as default launcher to work

I just tried to connect SGS to another laptop (Win XP 32-bit SP3, no KIES though). Same thing, the USB device is not recognized baloon show up and no USB indicator in the SGS status bar.
I'm going to Samsung Service Center, after calling them, they suggest me to bring the phone to the nearest Samsung Center. They said that this is not the first time and also said that the problem might be the connector or the cable.

have you read this ? http://forum.xda-developers.com/showpost.php?p=8107646&postcount=50
Seems kies has a bug where it can't work with files with 16chrs or more.. Told ya KIES is a piece of ****
Yes, But did you try the Mass storage mode
Settings/About/USB

I always just use Mass Storage mode to xfer files. KIES is crap.

As I said previously, my SGS has no problem at all connecting to Kies. USB Mass storage is working perfectly as well.
The problem I'm having now is the hardware (the cable or the interface) I guess, since I still can recharge the phone using the charger or the USB cable.
ps. I'm using Kies from Australia, the 1.5.1.10083.

Have you looked at the pins on the phone? are they screwed? Can you somehow find or burrow another Mini-Usb cable to test ? I have heaps as some of my external hdd's use mini-usb but you might have to buy a new cable.

Try this.. I wrote this a while back.. It may help. I know you suspect it's hardware, but it might be worth trying anyway.
http://www.blog.gleff.com/2010/07/fix-for-kies-not-connecting-to-galaxy-s/

ickyboo said:
Have you looked at the pins on the phone? are they screwed? Can you somehow find or burrow another Mini-Usb cable to test ? I have heaps as some of my external hdd's use mini-usb but you might have to buy a new cable.
Click to expand...
Click to collapse
gleff1 said:
Try this.. I wrote this a while back.. It may help. I know you suspect it's hardware, but it might be worth trying anyway.
http://www.blog.gleff.com/2010/07/fix-for-kies-not-connecting-to-galaxy-s/
Click to expand...
Click to collapse
Thanks for the help guys!
It's purely hardware problem. Yesterday I brought it to local Samsung Service Center, and because they said this is not the first timer, the technician quickly open the device and gosh... dust and some fungus were collected near the microUSB port! I admit I never close the USB port, just left it open after use, my bad!
After some cleaning and testing, the microUSB is working again.
Now I'm a happy SGS user again!

but that doesn't explain how it works on one Windows (Win7) but not on another Windows (WinXP)

AllGamer said:
but that doesn't explain how it works on one Windows (Win7) but not on another Windows (WinXP)
Click to expand...
Click to collapse
The SGS wasn't recognized in ALL Windows versions, since it was a hardware problem.
Now SGS is recognized in ALL Windows versions.

download "usbdeview" and delete the usb drivers for the specific device.

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

HD2 Charges but no data!?

Hopefully someone can help with this. I'm running Yuki 2.1 on my phone and my phone will connect to any pc and charge but will not be recognised as a device. Even after removing all USB devices with USBDVIEW i get no luck.
So steps I have tried:-
1.) Restarting everyting, phone and computer.
2.) Hard Reset phone
3.) Uninstalled all phone related software (zune, wp7 sdks etc)
4.) Different USB cables
5.) Disabled virus protection
Now I as far as I am aware I could just flash another Rom through magdlr (havent checked if this will actually work yet) but I only have the one sd card at the minute and because im using Yuki it'll be locked. So without being able to sideload the unlocker am I screwed? or can anyone think of something I can do?

I forgot to mention I also tried connecting to it via Ubuntu and both magdlr and WP7 dont appear to connect yet the phone charges fine. I'm stumped guys, any ideas?

the phone charging has nothing to do with windows desktop recognizing your phone.
what you said about ubuntu doesn't make sense...what are you saying about ubuntu?
i've found sometimes it takes a while for the pc connection to recognize the phone...shutdown phone an pc. try again. don't use pc to charge your phone..use external charger.
go into devices in the control panel..remove hd2 entries...reboot pc, try connecting.

OK what I am saying about both Windows (Multiple versions on multiple computers from Win7 to Xp) and Ubuntu (desktop os) is neither of them recognise the device what so ever, it is not a driver recognition issue, the device is apparentley not connected. There is no sign of it being connected to the PC at all, except for the fact it DOES charge. I have removed all previous drivers (including on my own pc where HD2 appears under devices & printers as suggest above), software and restarted both deivces many times since.
I am not charging my HD2 via the PC, I charge it from the wall. What I am saying is when it is plugged into a computer it does charge but according to the PC's it is does not exist as a connected device. Let alone recognizing the phone. This has only happened since this particular boot of Yuki 2.1, I have had multiple other Roms including this one before and never had this issue before.
I have connected it to computers on which the phone has never been conected to, and others that it has worked on all with multiple cables. So I am under the impression it is a phone issue, unless I have been a real derp and you can think of anything I may not have.

it could be a phone issue. i've always had yuki rom my phone, currently v2.1since first out, and no problems whatsoever. as i said, the phone charging via pc has nothing to do/with the pc recognizing the phone...it's a straight usb port power connection like connecting to any usb port.
see if you have the same issue with a different rom.

Thanks for your help. Think I have sorted it now.. I don't know why I didnt think of it sooner but I checked the usb port on the phone and the internal "pins" had been pressed up against the side of the connection so werent making contact with the cable. Looks like it was happily taking a charge like that but no data connection... seems to have just been a coincidence that after finishing installing yuki again that I was a total drip and mashed the charge into the port bending the pins.
So happy now I can keep my beloved HD2, untill the quad core run of WP8 devices are released.

I had the same problem in my MAGLDR mass storage USB phone connected to the PC but not in WP7.5, eventually was a problem with the cable.

glad to hear it was just misaligned pins.

Might also be the cable. I think I've got a similar problem - using the original USB cable Zune recognices the device, using another cable it doesn't (Unknown hardware). But the phone is charging with both - and I don't see any damaged pins on the phone.

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