Develop Bugs

[Q] USB not recognised

Hi all,
I've read a lot of forums on what seems to be a pretty common issue, however, with each attempt at a fix the answer is still elusive.
the problem i'm experiencing is that when I connect my (unrooted) Galaxy S2 to my pc (running windows 7) the USB device is not recognised. The phone says that it is connected (USB Connect MTP-Connected), however, when I try to access my phone via Kies or explorer it is not there. I also get an error message saying that the 'device is not recognised'.
I've taken the following actions:
- Reinstalled a fresh version of Kies
- Reinstalled samsung drivers (once prompted by Kies)
- Tried at least 3 USB cables including the original Samsung cable
- As per one of the blogs i read, i switched to USB debugging on and then off as there was no effect
- I've tried turning on bluetooth, then connecting the USB device (also a 'fix' i've seen on another forum)
- I've restarted my phone a number of times
- Connected via different USB ports
- Restarted my PC
Could anyone please help me.
Thanks,
Rob

Get a new one
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2

Uninstall all drivers, and Kies.
Restart the computer.
No go to device Manager under Human Interface Device/Universal Serial Bus controllers and see if there is that little yellow triangle there. If so click and uninstall any device with the aforementioned icon.
Now reset again.
Go to the Samsung website and download the drivers for the phone. Restart the computer yet again. Almost done.
Now attach your phone and it should be identified.
Go ahead and install Samsung Kies and you should be ok. I hope all this works.

I had a very similar issue with my last SII. One day it just simply would not be recognized by many computers using various USB cords including the OEM one. Windows always said something along the lines of " USB device not recognized, a device connected to this computer has malfunctioned." The computer would pick it up bit was listed as an unknown device in the device manager. Turns out it was a hardware failure so I had so get a warranty replacement
Sent from my Galaxy Nexus using Tapatalk 2

r0b0_0 said:
Hi all,
I've read a lot of forums on what seems to be a pretty common issue, however, with each attempt at a fix the answer is still elusive.
the problem i'm experiencing is that when I connect my (unrooted) Galaxy S2 to my pc (running windows 7) the USB device is not recognised. The phone says that it is connected (USB Connect MTP-Connected), however, when I try to access my phone via Kies or explorer it is not there. I also get an error message saying that the 'device is not recognised'.
I've taken the following actions:
- Reinstalled a fresh version of Kies
- Reinstalled samsung drivers (once prompted by Kies)
- Tried at least 3 USB cables including the original Samsung cable
- As per one of the blogs i read, i switched to USB debugging on and then off as there was no effect
- I've tried turning on bluetooth, then connecting the USB device (also a 'fix' i've seen on another forum)
- I've restarted my phone a number of times
- Connected via different USB ports
- Restarted my PC
Could anyone please help me.
Thanks,
Rob
Click to expand...
Click to collapse
That happened to me one day....
All I did was reboot my phone and tried a new cable and it worked
Sent from my SGH-T989 using xda premium

Not very helpful answers... you may have sorted this out already but...
One solution found on other threads that worked for me was this:
uninstall Kies
key in the dialer *#7284#
it has 4 option there..
UART (MODEM/PDA)
USB (MODEM/PDA)
Only change the USB setting.
Select PDA, if it already selected, select MODEM, don't hit "back", try reconnect, wait for windows to respond.
Unplug, then select PDA, try reconnect.

usb device not recognised
pardus said:
Not very helpful answers... you may have sorted this out already but...
One solution found on other threads that worked for me was this:
uninstall Kies
key in the dialer *#7284#
it has 4 option there..
UART (MODEM/PDA)
USB (MODEM/PDA)
Only change the USB setting.
Select PDA, if it already selected, select MODEM, don't hit "back", try reconnect, wait for windows to respond.
Unplug, then select PDA, try reconnect.
Click to expand...
Click to collapse
Dear all, I have same problem. I have official ICS 4.0.3 on mz Smasung S2 adn when I connect phone on mz computer i receiving information "USB Device not recognised" I tried all mentioned stuff:
reinstaling driver
cleaning micro stick on phone
hard reset
*#7284#
wipe clear data and cache
but i dont have connection Please help if someone have solution for this. Thanks in advance

srdjan_trisic said:
Dear all, I have same problem. I have official ICS 4.0.3 on mz Smasung S2 adn when I connect phone on mz computer i receiving information "USB Device not recognised" I tried all mentioned stuff:
reinstaling driver
cleaning micro stick on phone
hard reset
*#7284#
wipe clear data and cache
but i dont have connection Please help if someone have solution for this. Thanks in advance
Click to expand...
Click to collapse
Try changing your usb cable. If that still doesnt help, try it on another pc. If still not, then send it to samsung for repair.
Sent from my SGH-T989 using xda app-developers app

PC not recognizing Android USB connectio
romny19 said:
That happened to me one day....
All I did was reboot my phone and tried a new cable and it worked
Sent from my SGH-T989 using xda premium
Click to expand...
Click to collapse
Romny 19, you are dead on. I had thesame problem, read your posting and good to go.
Anyone trying this must remember to power down phone completely (Reboot),

[Q] Download mode doesn't detect any USB connection whatsoever (drivers installed)

Hi,
after getting my Note 2 LTE back from repair (they changed the mainboard, speaker, vibrator and USB port) I'm now trying to root it using Odin 1.85 (have tried 3.07 too) and CF Auto Root. The problem is that neither the phone nor the PC detects any USB connection at all while in download mode, ie. it doesn't even pop up with a driver request or anything. Device manager doesn't show any change in devices either. In this case the old "nothing happens" truly applies...
I've tried with going into download mode with voldown+home+power and with 'adb reboot download', with the only difference between the two is that when using ADB it doesn't display the white text in the upper left corner.
The PC runs Windows 7 (I used this same machine to root the phone when I got it back in November, and I haven't changed anything on it, other than the usual software updates). I've tried two cables that both work when connecting the phone while booted normally. The one I'm using now worked fine to transfer about 1 GB of pictures back to the memory card.
It's running the latest 4.1.2 (JZO54K.N7105XXDMC3) and is fully charged.
EDIT: I've now tried with uninstalling Kies and the Samsung USB drivers completely but the problem remains.
Thanks,
Magnus

Note 2 Android 4.1.2 download mode connect to PC
I have the same problem. Although your post is old, yet unanswered, I'm not sure if im posting correctly, or must create a new thread.
I connected my Note 2 to PC-USB during download mode. Also no action, but device manager showed a yellow triangle, while Odin running and pointing to a file for rooting.
I read in a post once that upgrading to Android V4.1.2 prevents rooting. How can I degrade it?
Phone connects successfully in normal mode.
Samsung Galaxy Note 2, SGH-T889 of T-Mobile (locked to carrier). Android V4.1.2
Tried on 2 PCs with Windows 8.
Also tried turning phone on to Download Mode after plugging it to USB.
I tried unlocking it, the unlocking software required phone to be rooted first!

Unable to connect phone to pc via usb

Hi,
I have rooted my phone with rootbox rom and i cannot seem to connect to pc using usb cable,I have tried everything (replacing cable,installed another rom liquidsmooth,updating drivers,troubleshooting with kies) nothing seems to work no matter what i do the windows still shows mtp driver installation failed.I would be very thankful if someone could help me out here,..Oh yeah and i am able to connect it to pc from recovery by mounting usb storage but not in normal mode

I had this issue with 3 different phones of my own. I ultimately had to remove the Samsung drivers and reinstall them. Do a google search for captivate drivers, you should find an xda post on this somewhere.

Zenfone 2 not detected when connected to PC

I was trying to transfer some files to my phone through a USB cable today, but the phone was not recognized by the PC at all (Even though it was working a week or so ago). I had some issues before with the cable needing to be still in a certain position or it would disconnect from the PC, so I tried using another USB cable which didn't work either (I tested both USB cables with another device, and both cables were working and the other device was recognized by the PC).
I also updated the USB drivers on my PC with the official drivers on the ASUS support page, and tried putting my phone in fastboot and recovery mode, but both were still not being recognized by my computer. My phone still charges properly, but I am wondering if the USB port got damaged somehow so that it can't connect to a PC anymore?

pyroshroom said:
I was trying to transfer some files to my phone through a USB cable today, but the phone was not recognized by the PC at all (Even though it was working a week or so ago). I had some issues before with the cable needing to be still in a certain position or it would disconnect from the PC, so I tried using another USB cable which didn't work either (I tested both USB cables with another device, and both cables were working and the other device was recognized by the PC).
I also updated the USB drivers on my PC with the official drivers on the ASUS support page, and tried putting my phone in fastboot and recovery mode, but both were still not being recognized by my computer. My phone still charges properly, but I am wondering if the USB port got damaged somehow so that it can't connect to a PC anymore?
Click to expand...
Click to collapse
uninstall and reinstall the drivers. Ensure that phone is not connected during the process.
also have you upgraded your pc os ? if yes then its a little cumbersome to get the same working...
i changed from stock to cm, it is showing well now ... using RR now

Is your phone encrypted? If so you need to unlock in order for your pc to recognize it.

Thank you both of you for the help, unfortunately, my phone was not encrypted so there was no need to unlock in order for it to be detected. Uninstalling and reinstalling the drivers didn't work, and my PC was already on windows 10 since a few months ago. I would also prefer sticking to the stock ROM for this phone for now since they keep coming out with updates.
In addition, I tried using a USB OTG cable to see if the phone could detect the USB drive and my phone couldn't (it has worked before, and my old Galaxy Nexus could still detect it). I also tried plugging my dualshock 3 into the phone, and it also couldn't be detected (also had worked before).
It looks like it's actually a hardware issue and my only option is to RMA it now. I'll have to do it at a time when I don't need my phone as much or when I am not as busy.
PS: In case anyone else has this issue in the future, quick charging also no longer works

zenfone2 I also experienced that, and I have tried several ways, but remains unchanged. I was dizzy today :crying:

ask:gal note 8 n5100 imei baseband null cant usb connect to pc (red cross batry icon)

i have posted my problem earlier in this thread below and havent get solution yet
http://forum.xda-developers.com/galaxy-note-8-0/help/note8-null-imei-unknown-baseband-sim-t3158071
my device is
Samsung galaxy note 8 inch GT-N5100 android version 4.4.2 baseband unknown kernel 3.0.31-2637964 [email protected]#1
Version number KOT49H.N5100XXDNH3 IMEI NULL.
my problem is
- i can't connect my note to computer, when i connect the handheld the battery shows red X cross and it wouldnt detect neither wont charging.
- but when the device charged via ac adapter it work fine.
- the device wont recognice sim celluler card "mobile network not available"
nb: all feature and function works fine inclde wifi, bluetooth, etc. (the error just gsm function and connection usb mode with PC)
i have tried this some work but couldnt solved my problem yet.
- i cant rooted my device via odin caused by the device won't detect any usb to my pc. (normal mode or download mode)
- i tried to restore efs by efspro software but not working caused by the device won't detect any usb to my pc.
- i tried to rooted via cfautoroot apk not working either
http://forum.xda-developers.com/showthread.php?t=2291839
- i have replaced the Micro USB charging port receptacle and it just the same, i think the hardware of my usb port is fine.
https://www.youtube.com/watch?v=nvpNliFIuN4
what i havent try is restoring my efs file with flasher tools like octoplus box. because i dong have that tools. and i think its too expensive to solving my problem of one device with buying flashing tools investment.
http://forum.gsmhosting.com/vbb/f453/galaxy-note-8-n5100-efs-problem-1829891/
is there any other solution, or direction which reference should i read, or maybe who should i pm that maybe he has the same problem and solved the day before.
apreciated any help, response, and view. thnks. -Fardha-

fardha said:
i have posted my problem earlier in this thread below and havent get solution yet
http://forum.xda-developers.com/galaxy-note-8-0/help/note8-null-imei-unknown-baseband-sim-t3158071
my device is
Samsung galaxy note 8 inch GT-N5100 android version 4.4.2 baseband unknown kernel 3.0.31-2637964 [email protected]#1
Version number KOT49H.N5100XXDNH3 IMEI NULL.
my problem is
- i can't connect my note to computer, when i connect the handheld the battery shows red X cross and it wouldnt detect neither wont charging.
- but when the device charged via ac adapter it work fine.
- the device wont recognice sim celluler card "mobile network not available"
nb: all feature and function works fine inclde wifi, bluetooth, etc. (the error just gsm function and connection usb mode with PC)
i have tried this some work but couldnt solved my problem yet.
- i cant rooted my device via odin caused by the device won't detect any usb to my pc. (normal mode or download mode)
- i tried to restore efs by efspro software but not working caused by the device won't detect any usb to my pc.
- i tried to rooted via cfautoroot apk not working either
http://forum.xda-developers.com/showthread.php?t=2291839
- i have replaced the Micro USB charging port receptacle and it just the same, i think the hardware of my usb port is fine.
https://www.youtube.com/watch?v=nvpNliFIuN4
what i havent try is restoring my efs file with flasher tools like octoplus box. because i dong have that tools. and i think its too expensive to solving my problem of one device with buying flashing tools investment.
http://forum.gsmhosting.com/vbb/f453/galaxy-note-8-n5100-efs-problem-1829891/
is there any other solution, or direction which reference should i read, or maybe who should i pm that maybe he has the same problem and solved the day before.
apreciated any help, response, and view. thnks. -Fardha-
Click to expand...
Click to collapse
Are you using two different cables in testing or are you just moving the charging cable from the adapter? I found uninstalling the windows usb driver and rebooting to reinstall may help detect the device. Some usb ports dont have 500ma output for charging or change to a different port if available. Changing the connection type on the usb status icon to reset and set the type of connection may trigger the usb driver to connect. I think for the most part your windows driver is failing to initiaize and detect your device. Trouble is getting it to reset cleanly and install properly.
Once the device becomes detected, you can perform the steps to restore your device in order to use a sim card.

gooberdude said:
Are you using two different cables in testing or are you just moving the charging cable from the adapter? I found uninstalling the windows usb driver and rebooting to reinstall may help detect the device. Some usb ports dont have 500ma output for charging or change to a different port if available. Changing the connection type on the usb status icon to reset and set the type of connection may trigger the usb driver to connect. I think for the most part your windows driver is failing to initiaize and detect your device. Trouble is getting it to reset cleanly and install properly.
Once the device becomes detected, you can perform the steps to restore your device in order to use a sim card.
Click to expand...
Click to collapse
Thanks for your response,
About the cable is fine to apply for any gadget, but won't work on my Galaxy Note. I have repaired it at unofficial service center and they said there is no problem with the cable nor the usb port
And still, they don't know yet where the trouble is.
is there any possibilities to fix my Galaxy Note in this case? Thank You