Database Users

Yesterday my Phone became an unrecognized USB device

After months of no problems yesterday I plugged my phone in for its nightly charge and noticed that it did not trigger the usual USB mount prompt.
I assumed it was Windows, but I have a bunch of machines and operating systems so I checked and they all has the same result. I switched out cords and did a complete power reset (taking battery out) no change.. The Phone charges through the USB but the computers say "unrecognized usb device" and cannot mount the phone as a drive and the phone does not offer the option as it used to???
I don't recall getting any sort of update that might have related to this?
This is the original T-mobile version

This happens to me all the time. However a restart of my phone and computer solves the issue.

DarkAgent said:
This happens to me all the time. However a restart of my phone and computer solves the issue.
Click to expand...
Click to collapse
Neither of those things worked for me. There's gotta be something else to it.

jrocka01 said:
Neither of those things worked for me. There's gotta be something else to it.
Click to expand...
Click to collapse
Go over changes you made to your phone recently.

only flashing another ROM worked for me... try reflash ur ROM, and wipe stuff if it doesnt work

DarkAgent said:
Go over changes you made to your phone recently.
Click to expand...
Click to collapse
This all started when I manually installed 2.3.4. Everything else works fine. I'm not the only one with this problem.

roshga said:
only flashing another ROM worked for me... try reflash ur ROM, and wipe stuff if it doesnt work
Click to expand...
Click to collapse
How do you do that without USB connectivity?

It is very frustrating, maybe a hardware fail? I see just enough post relating to the issue that makes me know it is real but not sure how to resolve,, Do we have to go to Best Buy? or is there a direct Samsung route?

This too happens to me. Whenever I plug it into my laptop on the top USB slot, it doesn't recognize it. If I plug it in on the bottom USB slot, it does. Not sure why. This, however, is only the case if I'm using a different USB cable than the one that came with the phone itself. Once again, not sure why.
Perhaps you are using an alternative USB? Or plugging in on the top? Not sure how I can help you more than that, sorry. Hope you find a fix!
Sent from my Nexus S using XDA App

Have you tried a different USB cable?
Sent from my Nexus S using Tapatalk

unforgiven512 said:
Have you tried a different USB cable?
Sent from my Nexus S using Tapatalk
Click to expand...
Click to collapse
Using official OEM cable that came with the phone. And, again, USB worked fine until I manually installed 2.3.4.

Well It is off to Samsung for repair
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!

DarkAgent said:
This happens to me all the time. However a restart of my phone and computer solves the issue.
Click to expand...
Click to collapse
Recently started happening to me, needed to transfer some files off, had to resort to dropbox etc.. rebooted phone+computer ,still not working.
Came good a few days later using same equipment, same cable,
Mysteriously fixed itself ?

Nexus S USB connection issue.

Last week when I plugged my USB cable into my phone, it acted normal. The screen where it asks me if I want to connect USB came up, and I said yes. Everything was normal. It was baller.
Today, that doesn't happen. The screen doesn't come up and all the USB cable does is charge my phone, much like the wall plug does.
I've tried to install USB drivers, but they always require me to find "Android" in Device Manager, and it's never in there. The USB cable is doing nothing but charging my phone.
I managed to add a few mp3s over wifi, just to make sure that was actually working.
The phone is not rooted, (I was actually just going to try to do that) and everything is stock aside from a few apps.

I would really like some insight on this, please.
Do I need to get the phone replaced? Am I doing something wrong?

OK, I new to this, but thought I'd comment. If USB debugging is turned on, my seems to do that.
Settings -> Applications -> Developement -> USB Debugging
Beowins said:
I would really like some insight on this, please.
Do I need to get the phone replaced? Am I doing something wrong?
Click to expand...
Click to collapse

Did you change your kernel recently?
Sent from my Nexus S using XDA Premium App

sagech said:
Did you change your kernel recently?
Sent from my Nexus S using XDA Premium App
Click to expand...
Click to collapse
I've done nothing to the phone. Only installed a few random apps.

sorry to hi-jack your thread!
mine does exactly the same, but all i've done is manually update to 2.3.4 and my usb hasn't worked since, like you i've tried installing the drivers and that's done nothing and its also in usb debugging.
i don't know what to do or how to get it to work again, all my searching on here and via Google don't bring up much

Beowins said:
Last week when I plugged my USB cable into my phone, it acted normal. The screen where it asks me if I want to connect USB came up, and I said yes. Everything was normal. It was baller.
Today, that doesn't happen. The screen doesn't come up and all the USB cable does is charge my phone, much like the wall plug does.
I've tried to install USB drivers, but they always require me to find "Android" in Device Manager, and it's never in there. The USB cable is doing nothing but charging my phone.
I managed to add a few mp3s over wifi, just to make sure that was actually working.
The phone is not rooted, (I was actually just going to try to do that) and everything is stock aside from a few apps.
Click to expand...
Click to collapse
Put your phone into bootloader mode and try whether it detect or not?
And also, see if there is two line of words written
USB init start
USB init end ;-)
Sent from my Google Nexus S using XDA Premium App

Try another usb cord, and especially if you're using the samsung cord.
I had the same issue but when I switched to my Htc cord and my blacbkberry cord, everything worked as it should.
Sent from my Nexus S 4G using Tapatalk

plmiller0905 said:
Try another usb cord, and especially if you're using the samsung cord.
I had the same issue but when I switched to my Htc cord and my blacbkberry cord, everything worked as it should.
Click to expand...
Click to collapse
ive just tried my works blackberry usb cable and it works fine now! very odd! thanks for your help

onslack said:
sorry to hi-jack your thread!
mine does exactly the same, but all i've done is manually update to 2.3.4 and my usb hasn't worked since, like you i've tried installing the drivers and that's done nothing and its also in usb debugging.
i don't know what to do or how to get it to work again, all my searching on here and via Google don't bring up much
Click to expand...
Click to collapse
Wow, this is my post, verbatim. Any ideas or fixes?

plmiller0905 said:
Try another usb cord, and especially if you're using the samsung cord.
I had the same issue but when I switched to my Htc cord and my blacbkberry cord, everything worked as it should.
Sent from my Nexus S 4G using Tapatalk
Click to expand...
Click to collapse
Wow, you're right. My HTC cord worked. Thanks a lot.

I have had this happen on to me and have determined that a) the long cable that came with the NS4G is unreliable when used for USB connectivity with my PC. Shorter cables (even the shorter Samsung cable that came with my Epic) work consistently. I am guessing that this is a USB Bus power issue and some people will have better mileage than others using the stock cable, depending on their PC.
b) on a few occasions, it seems I've somehow borked the PC's USB controller and the PC wouldn't recongnize anything until I rebooted it.

window7 said:
Put your phone into bootloader mode and try whether it detect or not?
And also, see if there is two line of words written
USB init start
USB init end ;-)
Click to expand...
Click to collapse
I am getting the
USB control init
USB control init end
when in bootloader and when doing the i press vol up and vol down (triangle with android in it" with downloading below).
I would like to flash my phone to factory using Samsung Simple downloader for NS4G.
Background, installed Ice Cream but didn't have radio.img so used an SU to downgrade back to 2.3, did that but no mobile network. Then the phone updated to 2.3.6 and now getting that error. Any help will be appreciated.
I searched a few times on this forum and on google.com no luck. tried to adding a recovery file manually and zip it as update.zip and install from bootloader no luck. (use file explorer and dropbox to get files on to phone).
Thanks
Amar Bar

i had this issue a few months ago, turns out the usb port on the phone got defective so i could only charge it but not use the mass storage function, had to get it replaced under warranty! hope this isnt the issue with you guys

innisdb said:
i had this issue a few months ago, turns out the usb port on the phone got defective so i could only charge it but not use the mass storage function, had to get it replaced under warranty! hope this isnt the issue with you guys
Click to expand...
Click to collapse
Was your phone rooted at any point before the issue? Not sure if they would fix it under warranty for me. I will call Samsung and see.

Thanks, I tried that but no luck. Still need to tried other cords. Also.

My phone developed this problem a couple days ago. I haven't done much to troubleshoot it...figured the port must be damaged.
(Not using the Samsung cable, btw)

AardvarkAdventure said:
My phone developed this problem a couple days ago. I haven't done much to troubleshoot it...figured the port must be damaged.
(Not using the Samsung cable, btw)
Click to expand...
Click to collapse
It might be the port. I will have to get a samsung cable and try it, but i doubt it will help. Plus i can tell Samsung I tried everything. (I looked a ticket, but they said get a samsung cord, they don't trust the Palm Pre cord i am using).
I had to downgrade to the HTC Hero until i get the phone fixed.

I think I cooked my USB functionality.

Hey gang. Wondering if you can help me with a strange issue I've got. I can't seem to connect my phone to my computer via USB. Wondering if anyone could help determine if there's a possibility of repair or not.
==Possibly relevant info==
Samsung Vibrant
Android 2.2 Froyo
Kernel version: 2.6.32.9
Build number: FROYO.UVKB5
==End relevant info==
So, my USB is acting up. Has been for the last few months, where although it charges when I plug into a computer, it's not connecting to allow data transfer. I haven't been too terribly worried, this happened before then cured itself when I did a factory reset. The thing that usually triggered it was when I tried connecting to my linux box in media player mode. The phone would just kinda lock up, I'd have to restart it and then USB wouldn't connect. But after doing the factory reset it was fine the first time. THIS time however, since I'd just left it stock now I'm itching to flash a custom rom but even though I've wiped the whole stupid phone totally clean, it still won't connect. I'm trying to follow a method on an article on dkszone.net called "Bypass E - Signature Verification Fail Issue On Vibrant Android 2.2".
So it seems I need USB for the debug mode.
What I think my main problem is, and where I need some help, is that I had purchased a super cheapwad USB car charger off of amazon for like 35 cents. Every time I connected to it, my phone would ask me if I wanted to connect using kies, media player mode, or data storage mode. I thought it was annoying but didn't really think it would harm anything. But now that I'm thinking about it, it's probably been pumping 5v into each pin on the USB port, whereas the USB functionality uses probably 3.3v, and I'm afraid I cooked something.
The random part here though is that about 5% of the time it does (sortof) connect. It brings up the USB options when I want to connect, brings up the icon saying it's using debug mode, etc. But my machine just reports that it didn't recognize the USB device. So, I'm thinking it's on the fritz, but figured I'd check here to see if I could possibly find a ray of hope.

Scooterx3 said:
So it seems I need USB for the debug mode.
Click to expand...
Click to collapse
You can use ADB over tcpip. There's many a free widget to enable it on google play or Do it manually

Thanks for that, I had been wondering if there wasn't a way to do that over wifi. My issue is that sadly I haven't even rooted the phone. ADB over WiFi requires root, whether I do it manually or use one of those super sweet apps.

So anyways, guess what?
My brother in law has the same phone I do, and I grabbed his phone one day and plugged it into my computers and had the same problem as with my own, and I know he hadn't plugged into the same charger I had, hadn't tried the media mode on Linux like I had (which were what I thought were the big contributing factors). SO, I kept digging, found that I hadn't quite yet cleaned it properly. I'd tried my best to clean it but until I swabbed it well with some rubbing alcohol it wasn't as clean as it should've been.
Long story short, I'm backing everything up so I can start flashing roms.
Moral: just clean the dang thing really well

Windows 7 will not detect device

When I plug my wife's phone in, most of the time it does not even recognize that anything is plugged in at all, but the phone charges. Sometimes in device manager the phone comes up with a yellow exclamation point and the error
Windows has stopped this device because it has reported problems. (Code 43)
I installed the Android SDK and USB driver.
I installed the Samsung Driver from the site.
I thought possibly it was a software issue, so I was going to try to set the phone to factory settings. When I go into recovery, there is an Android logo with a red exclamation point, then eventually it boots back into Android with no change.
I manually added the driver into android_winusb.inf as I saw on another post here, but no matter what it is not picking it up.
I want to just be able to connect so I can root the phone and put a ROM on it. The phone is pretty hosed and slow. Any suggestions?

I had this at one point. It was the device, I had to get a replacement.
Sent from my SCH-I815 using Tapatalk 2

esoh said:
I had this at one point. It was the device, I had to get a replacement.
Sent from my SCH-I815 using Tapatalk 2
Click to expand...
Click to collapse
Well I do have insurance on it, and I agree that is the easy way, but I really don't think the hardware is broken.
I mean it charges, so the USB port works. I think if I was able to reload Android from scratch onto it, it would work. However, every solution I see requires rooting and you can't root without USB. It is a frustrating catch 22. Any other possible solutions? If not, I guess we are screwed.
The most frustrating part is factory reset not working.

I am currently having similar problems like you, I have one USB port from memory card reader and on that port phone isn't even charging but a flash drive works without problems. On other ports (back of case and front) there is charging but computer can't recognize the device. Try uninstalling all phone related drivers or cleaning them with some sort of driver cleaner. Then reinstall driver, or let Windows update it automatically. Mine worked for a while, and in device manager it was recognized as Acer ADB.
EDIT: Hi, just to report reason of my problems, my USB cables started failing for no apparent reason, my original Samsung USB cable and one other no name have both failed. I'm currently using my old LG USB cable, wrapped up in insulating tape, but everything is working good. So try some other micro USB cable, it maybe the source of your problems.

[Q] Formated Nexus 7 2012, now what?

Hello all!
I'm just guna say, this might get long winded so, TLDR, Nexus 7 has no OS, I can get into the boot loader, the only thing I can actually do is get into TWRP v2.8.01, computer doesn't recognize it, can't get it to even see a flash drive that I've formatted to Fat32, now what?
For those who want some background. I got my N7 refurbished from ebay, if that matters at all. First thing I did was update it to Kitkat and root it. Installed some apps and was happy with it for a few months. About a month or so ago it stopped connecting to the Google Play Store. I wasn't bothered by it too much. But as time goes on, I find new apps and would like to use them. But obviously can not.
So, just to be safe, I wrote down all the apps I still had on it just in case they didn't want to load back up. Did a factory reset, still couldn't connect. Looked online and cleared caches and stopped services. Still didn't work. When I went onto the GPS, heh, on my computer it said that I had no devices so that was a clue of some sort. I could still go onto Youtube and log in and use it just fine. Just nothing in the store. So I decided to try something else.
What that was was to clear all my data with TWRP. Went to put in my email and password, couldn't connect, tried another wifi connection, still no go. I was able to use it, but the Play Store still didn't want to play nice. So in a bit of, "rage" we'll call it. I formatted it and now I'm where I am now. With a tablet that won't boot, just sit at the Google logo for up to 5 mins, as long as I've let it sit there for anyway. I have downloaded the Nexus Root Kit and tried to use that, but my computer won't even see my N7 now. In the bootloader or TWRP. So I can't even get anything onto it now.
So, what now? Do I have a bricked tablet that won't do anything or is there something an Android Guru out there can help me with? I'd like to keep it. I mainly used it to read and for various videos.
I have posted on forums.androidcentral but after a week and almost 300 views, no one has made any comments. I'm sorry for my ignorance if I'm missing something.
Thanks! I shall be hoping for good news.

So, does ADB recognize your tablet or not when you type "fastboot devices"?

I take it you mean shift+right clicking in the platform tools folder, open command window here, and typing that into the command prompt? If so, then no, it doesn't show up.

Waslow said:
I take it you mean shift+right clicking in the platform tools folder, open command window here, and typing that into the command prompt? If so, then no, it doesn't show up.
Click to expand...
Click to collapse
Can you go into the bootloader? Did you install the right drivers?

I can get into the boot loader just fine. Recovery sends me to TWRP 2.8.01. I've got the drivers from the Android SDK Manager, Rev. 11 apparently. Would that be any different from the standard drivers that get installed when you hook up the N7? Well, when it works?

Waslow said:
I can get into the boot loader just fine. Recovery sends me to TWRP 2.8.01. I've got the drivers from the Android SDK Manager, Rev. 11 apparently. Would that be any different from the standard drivers that get installed when you hook up the N7? Well, when it works?
Click to expand...
Click to collapse
That is correct. Use this: http://forum.xda-developers.com/showthread.php?p=48915118#post48915118
And if doesn't work check in device manager.
If it works flash the latest factory image and then you will be good to go

I've already had that installed and set up and nothing pops up in the device manager. I've also tried all the usb ports on my computer to no avail.

Waslow said:
I've already had that installed and set up and nothing pops up in the device manager. I've also tried all the usb ports on my computer to no avail.
Click to expand...
Click to collapse
Then try the driver manual in nexus root toolkit

I can follow the instructions, but that doesn't resolve the fact that my computer can't see the Nexus .

go into device manager and delete every single entry that suggests anything to do with a phone, tablet, google device, nexus device, ETC. if you dont do that first, this will probably not work.
once you delete every single entry in there, go to the top command bar and somewhere in those menus is an option to show disconnected devices. delete everything again as above.
now, does your tablet still charge on the AC plugged into the wall? does it still charge when plugged into the computer usb? drivers are NOT required for usb to supply power. if so, the usb connector is probably OK. if not, your usb connector may be toast.
next, connect to the computer. does windows show any device connected? if not, try a different usb cable. report your findings back.

Sorry for the late reply.
There is nothing in the device manager related to my Nexus, which is odd, it had entries for flash drives, a camera, and my phone. All of which were in the disconnected devices. I got rid of just for the sake of it. Nexus charges just fine, either from the wall or any of my usb ports. If there is no way to make ANY computer see my Nexus, is it safe to say it's bricked?
I do have a cousin who's fluent in Linux if that means anything. I know that Android is a flavor of it. Might work better if both devices speak the same language. Grasping for straws I know.
Again, thanks for the help fwayfarer, GtrCraft, and Fobos531!

If I am reading right, you did NOT try a new USB CABLE yet, did you?
Try a known good USB cable, what I mean by that is try a cable you KNOW works for data transfer on another device and report back.
Connecting it to a Linux machine isn't going to make any difference in my opinion.

I have 2 cables and they transfer things just fine with my phone and my Kindle. I just downloaded everything off of both things, and transferred them back. No issue with the cables. I just popped open my Nexus and it looks like the usb connector and ribbon are fine. I did wiggle them a little but to no avail.

Pull the battery cable, smash the power button for a few minutes, reconnect and try again. It won't recognize a USB thumb drive in bootloader or recovery to my knowledge, BTW. I noticed you mentioned it not seeing one.

I unplugged the battery, hit the power switch for a while, plugged the battery back in, plugged the usb back in, nothing. Still nothing. I had read before that you can put the version of android you wanted on a flash drive. With an otg cable you could use that to update/install what you wanted.

You're probably right, I haven't tried using one in recovery for a long time. You didn't change the battery or anything recently did you?

Nope, haven't replaced anything in the Nexus. The only thing that I could think of that could be wrong is the usb connector. But for it to "fail" at the same time I formatted everything, too much of a coincidence.

Over a week bump

I ran into a similar problem about a year ago. Unless your tablet is connected to the computer you will not see it show up it the windows device manager. You should be able to connect your N7 to a work computer & it should go out for the drivers. If not, then you are Sol. You might have a blown main board.

The only thing my N7 does when I plug it in, is that it charges. That's the only thing I can get it to do. Well, this sucks. If I really have a bricked, or worse, tablet, it's still good for its screen and other bits.