Database Users

Problem with usb connection

Hi guys ,my problem is that when I connect my phone via USB cable at first there is no problem, data transfer , windows mobile device center, everything is OK. But when I want to flash the phone pressing vol-down + switch on/off keys the phone is not connected to the PC. And I can't flash it. Also the phone wouldn't like charge trough the charger ,only with the data cable. Is it possible to have any liaison between the problem with charging with charger and no-connection when try to flash.
Also my phone was to the service for touch-screen change ,is it possible the technician make any mistake ? Cause I think that if he make a mistake with the connector nothing gonna work ,but it works at different situations.
Regards!

check to be sure USB SYNC driver installed correctly and also try a different usb cable.

I'll try but there is no logic ,the cable works when charge the phone, works when is connected to device manager but doesn't works when flashing ?

exactly. the device requires different drivers.
1. there is internet sharing and disk mode (which works with all computers, because those drivers are in the operating system)
2. then there is one driver for syncing
3. and another one for flashing
it is not the same kind of data transfer, which is why you need a different driver. but the thread "[tut] updating htc sync drivers" should cover all your windows vista/7 driver needs and a tutorial on how to install them, which in case of a x64 system can be fairly complicated.
if you already have hspl installed (which you can determine by entering bootloader mode and looking whether it says 1.56Olinex), you can also flash using the sd car method. put a rom of your choice on the sd card, name in BLACIMG.nbh and enter bootloader mode, you will be presented with options to flash the rom.

Ok, but in instructions at the thread you give me is written that I have to start making the steps after I see "USB" on the flashing screen. But I don't see it, it's only "Serial". And now what ? I know that if on the screen i written "USB" the phone and the computer are connected and there is no problem to flash ,but now what ?

well, before you start, put your device into bootloader mode. it will show "serial", then connect it to the pc. test your connection using mtty 1.42 (you'll find several download options here in the forum).
the connection settings for mtty are USB 115200-8-1-No-NONE-None
if it works, connect and press enter, the command shell should show USB> then.
if usb is not present in the connection settings, your connection is not established yet. proceed with the tutorial then. during the entire procedure, the device should remain connected to the pc in bootloader mode, so you install the driver for the right device state.

Hello,
I've problem something like this. Few months ago when i was conecting my phone to computer was everything OK, activesync, disk drive, but now nothing, just charging the phone. I've tryed everything in USB to pc zone, but nothing. When i'm going to bootloader it's writen serial. What can be here?

since you already tried all the different connection methods and even bootloader mode does not connect, there are hardly any options left, where the trouble could be:
- the usb port on the blackstone
- the usb port on the pc
- the cable
you can try another port on the pc (or even better, another pc altogether) and/or another cable, like from a digital camera, an external hdd... (many devices have mini usb cables, you should be able to use either one of those)

USB doesn't work after OTA

Hey all,
I have tried to google and figure this out but my phone doesn't show up in device manager in windows or in android file transfer on mac EXCEPT when in download mode or when the phone is off/charging via my computers USB port.
So when in download mode, the phone shows up in device manager....
When my device is off and charging via USB port, it shows up in device manager...
I have tried USB debugging mode no change...
Charges just fine. No usb port issues because it connects during download mode etc...
During these times, i obviously can't access the SDcard.... but as soon as the device boots, it disconnects and disappears from device manager even though its still charging etc...
This only happened after the last OTA update.
I assume i will have to restore to defaults as its probably an issue with the kernel and usb protocol but I dont have the phone rooted and i don't want to root it at this time... I am hoping there might be a quick fix and/or setting i am missing.
Thanks!

tronicsmasta said:
Hey all,
I have tried to google and figure this out but my phone doesn't show up in device manager in windows or in android file transfer on mac EXCEPT when in download mode or when the phone is off/charging via my computers USB port.
So when in download mode, the phone shows up in device manager....
When my device is off and charging via USB port, it shows up in device manager...
I have tried USB debugging mode no change...
Charges just fine. No usb port issues because it connects during download mode etc...
During these times, i obviously can't access the SDcard.... but as soon as the device boots, it disconnects and disappears from device manager even though its still charging etc...
This only happened after the last OTA update.
I assume i will have to restore to defaults as its probably an issue with the kernel and usb protocol but I dont have the phone rooted and i don't want to root it at this time... I am hoping there might be a quick fix and/or setting i am missing.
Thanks!
Click to expand...
Click to collapse
You do have to have USB debugging mode checked. If you don't have the developer option enabled in settings, go to about phone, find your build number and tap on it rapidly until it says your developer option is enabled. Back out and you should see a developer tab. Click it and make sure USB debugging is checked. If that doesn't work you might reinstall the latest USB drivers.

i did both of those. the odd part is when in download mode windows chimes that my device it attached.. no problems right? but anytime the android OS is running no chimes at all no recognition at all on any computer... its almost like back in my linux days when the kernal had a usb module failed to load... i swear its as if the kernal turned off usb data communication... power is fine... just wont communicate unless in download mode or in a power off state.... totally weird...

When you plug it into the computer, pull down your notification drawer, make sure USB setting is set to MTP. It usually is set to installer, or charge only by default.
Also I'd say completely wipe out your phone drivers on the computer, and reinstall all new ones.
Possibly reinstall ADB as well.
Sent from my SM-G900V using XDA Free mobile app

Pc not detecting android but charging

Hi Basically plugged my S4 i9505 in via usb. Nothing shows in my computer, but phone remains charging. I have tried uninstalling and reinstalling all samsung usb drivers but it does nothing. Tried installing kies/older usb drivers, still no luck. Regardless of if there are drivers or not on my pc, there is no detection what so ever. My pc is detecting my second S4 I9505 perfectly. Anyone know the solution to this?

majorr92 said:
Hi Basically plugged my S4 i9505 in via usb. Nothing shows in my computer, but phone remains charging. I have tried uninstalling and reinstalling all samsung usb drivers but it does nothing. Tried installing kies/older usb drivers, still no luck. Regardless of if there are drivers or not on my pc, there is no detection what so ever. My pc is detecting my second S4 I9505 perfectly. Anyone know the solution to this?
Click to expand...
Click to collapse
Tap 5 times buildnumber in settings menu under: about phone to open developer settings. Enable USB debugging. Now you can choose what to do when phone is plugged in pc.

lekiaM said:
Tap 5 times buildnumber in settings menu under: about phone to open developer settings. Enable USB debugging. Now you can choose what to do when phone is plugged in pc.
Click to expand...
Click to collapse
USB debugging is Enable still nothing happen

USB debugging is not required in order to have the phone recognized by the computer.
Have you tried different USB cables and USB ports? Is the phone detected on other computers?

i had the same problem.... and we found out that the pins or the usb connection sh1t from the phone doesn`t make good contact. si try to push a little but or force up and down the usb cable to the usb from phone maybe you will manage to find a stable connection or something.
when i connect to phone to the pc i have to hold the usb cable connected to the phone in a weird position. that works for me

PC won't detect S7, all conventional fixes exhausted!!

I've got 5 S7s on my desk, all Canadian variant, all from the same manufacturer all the same model. - SM-G930W8
All are recognised by my PC but one and I can't work out why not!
Plugging the phone into the PC makes no noise from the PC but the phone seems to detect a regular charger not a PC.
I have plugged it in using different cables including the one in its box and the ones used on other devices that were recognised and only this phone doesn't work with any of them.
I have plugged in, unplugged and rebooted many times.
I have set the USB configuration to MTP (Media Transfer Protocol)/Transferring files.
USB Debugging is ON and OEM unlocking is ON.
I have tried booting into stock recovery and wiping cache AND factory resetting.
When phone is turned on "adb devices" returns nothing.
I have installed Samsung Kies and Samsung Smart Switch to reinstall the drivers.
NOTHING IS WORKING!
All threads I find tell me to do the things I have listed above and have people saying these have worked but all of them I had already tried and double tried and nothing is working.
The cables are correct and working with other S7s of the same model.
All the correct drivers are installed and have been uninstalled and reinstalled.
All the correct setting are selected and OEM unlock and USB debugging enabled.
Phone was fresh out the box as were the other four and all cables.
Samsungs apps installed on PC to ensure best drivers installed.
Would really appreciate some guidance or consolation that its not something stupid I'm doing! I work with these phones everyday and this has never happened! Just banging my head against a brick wall trying to resolve it

maybe faulty usb port, my nephew had S6 with the same issue, service replaced usb port and it started
to work with PC.
try download mode and see if odin see your phone.
try to move the cable a lil bit and see if sth appears for a second.

yaro666 said:
maybe faulty usb port, my nephew had S6 with the same issue, service replaced usb port and it started
to work with PC.
try download mode and see if odin see your phone.
try to move the cable a lil bit and see if sth appears for a second.
Click to expand...
Click to collapse
Thanks but unfortunately Odin doesn't recognise in download mode.
Could it be a USB port problem if I used the same port for the other 4 devices and have no issue?
I'm considering sending the phone back to manufacturer to be honest I think it may just be a faulty device or something!

I bet its microusb port fault

Had a similar issue on Windows 10 , if that's what your running let the phone be connected, uninstall the driver from device manager, and then install driver select have disk and select the basic mtp , if this doesn't help connect to Microsoft support and they'll guide you through it , worked for me , my phone used to detect on other laptops but mine , also I could connect other phones on mine but not my phone, hope this helps

same issue here

Unauthorized device ADB

I'm currently on H91810j and decided today to finally root my device.
I was able to get turn bootloader on, but after that, it's been downhill
I've tried:
deleting the adbkey/adbkey.pub file
2 different LG drivers
multiple usb ports
multiple methods of alternating between different usb connection methods ( midi, charging, photo transfer, etc)
factory restart
multiple restarts on pc and phone
kill and start adb server
revoke usb debugging authorizations
I've run out of ideas at this point. I've tried other suggestions from past threads, even for different devices with no success.
I'd appreciate the help as I haven't found someone who's gotten this far without solving the issue, so this is new territory it seems.
Thanks in advance

r3dd09 said:
I'm currently on H91810j and decided today to finally root my device.
I was able to get turn bootloader on, but after that, it's been downhill
I've tried:
deleting the adbkey/adbkey.pub file
2 different LG drivers
multiple usb ports
multiple methods of alternating between different usb connection methods ( midi, charging, photo transfer, etc)
factory restart
multiple restarts on pc and phone
kill and start adb server
revoke usb debugging authorizations
I've run out of ideas at this point. I've tried other suggestions from past threads, even for different devices with no success.
I'd appreciate the help as I haven't found someone who's gotten this far without solving the issue, so this is new territory it seems.
Thanks in advance
Click to expand...
Click to collapse
okay so i revoked first, then i disconnected from usb, power down device, power back on plug in then click charge only again then it should pop up for you to connect to pc from phone, CHECK MARK ALWAYS hit okay.
or skip windows bs drivers and OS. and download FWUL live USB. there is a forum on XDA just type Lglaf H918 and follow the steps to making the fwul usb. linux doesnt need all that fun stuff to get the job done like windows.