Universal Serial Bus (USB) is an interface to communicate between the mobile device and the computer. This is for questions regarding connecting an Android device to a computer's USB interface.

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68
votes
4answers
53k views

How to set up reverse tethering over USB?

My HTC G2 phone is rooted and running Cyanogenmod 7 I don't have a data plan. Sometimes I want to connect the phone to the Internet when there isn't Wi-Fi, to update Market apps, backup SMS messages ...
25
votes
7answers
23k views

Why is charging from computer using USB slower than using an outlet?

And what is roughly the ratio of the charging speed in USB vs charger? My phone is Samsung Galaxy S, if that matters.
19
votes
2answers
19k views

Can you connect USB devices to an Android phone?

I have an HTC Desire and would like to connect USB devices to it, for example an external USB thumb drive to transfer files or a USB keyboard. Is this at all possible?
17
votes
4answers
6k views

What is USB debugging? Can I keep it ON forever?

Sometimes I need to transfer some music from my PC to my Galaxy S2 and must always activate USB debugging. Then I think, can I keep it ON forever? I mean, Keep it ON for ever can give me a problem ...
17
votes
1answer
66k views

Are there USB settings in CyanogenMod 10? If so, where?

When I shut off USB Debugging in the developer settings I get a USB Mass Storage prompt upon connecting the device to my computer. However, for the life of me I can't find a place to shut off this ...
16
votes
2answers
19k views

Can you read a USB flash drive from an Android phone?

I have a Samsung Galaxy S (i9000) with Android 2.1. I am wondering if it can read a USB flash drive. It will be really useful to copy files across USB drives so you don't have to carry laptops ...
15
votes
10answers
151k views

“MTP USB Device” driver error (screenshot) when connecting my Galaxy S to my PC in Kies mode — How can I resolve this problem?

I always got this error when trying to connect my Galaxy S to my PC in Kies mode. I can connect it as "Mass storage" with no problem. But I need to connect with Kies mode to get 2.2 (froyo), but I ...
15
votes
1answer
4k views

Charging over USB can be harmful?

Considering that charging over USB can take around 5 hours (to only 1-2 hours it would take from the wall mounted plug), can it be harmful for the smartphone battery if it's always charged from USB?
15
votes
5answers
7k views

What is the fastest way to transfer huge files beween two android powered devices?

What is the fastest way to transfer huge files (e.g. 500MB) between two android powered devices? Bluetooth? WiFi direct? Beam? or maybe USB on-the-go?
15
votes
17answers
61k views

Samsung Galaxy S3 not connecting via USB

Since about a week, my S3 doesn't connect anymore via usb to any computer. I don't think it's driver related as it was working before and I didn't change anything on the computers. It now runs Jelly ...
15
votes
5answers
13k views

Is there a way to see the device's screen *live* on PC, through ADB?

I am a vlogger and after getting HTC Desire HD, found out its camera was all I ever needed. However, I usually have to see myself while recording video, to control my facial expressions, and with a ...
14
votes
6answers
147k views

Unable to connect Galaxy S3 to PC via USB

I've had my Galaxy S3 for a few months now, and have always been able to connect to my PC via USB. A few days ago, it suddenly stopped working. I've found many other Android.SE threads, but none have ...
14
votes
0answers
15k views

Use USB as network access for an Android device (reverse tethering)? [duplicate]

Possible Duplicate: How to set up reverse tethering over USB? Note I'm not talking about getting my PC network access through my Android device, I'm talking the opposite. I sit in a dead ...
13
votes
1answer
367 views

What's the name of the protocol that android devices use in debug mode?

I have a strange Android prototype what we got from a customer. Said customer has forgotten about it, and I'm now fiddling with it to see if I can make it do anything interesting. The device appears ...
12
votes
4answers
21k views

Can I use my Android device as Wi-Fi Dongle (ie Tethering to PC through USB, but using Wi-FI not Phone Network)?

I want to use my Android phone to connect a desktop (windows 7) PC to the internet via Wi-Fi (ie, not muching though my Data plan). Is this possible with the various tethering options out there? The ...
12
votes
5answers
6k views

Can a device pretend to be a USB keyboard?

What I'm looking for: Is there a way to make the device claim to be a keyboard/HID when plugged into a USB port and "type in" the contents of the clipboard? More accurately; What would it take to ...
12
votes
3answers
5k views

Are Android chargers universal in terms of power (Voltage, amperage)?

I would like to buy a car charger, wall charger and USB cables for my Samsung Intercept. However, $20 for a charger seems expensive and I want to avoid getting ripped off. The Samsung Intercept Manual ...
11
votes
7answers
4k views

Stream Sound from Ubuntu to Android

I got tired of replugging my headset between a desktop and Android when someone calls me. Is there a way to stream sound from Ubuntu (I use Pulseaudio) to Android phone over wifi or usb?
11
votes
6answers
12k views

Not all files are visible over MTP

I have LG L5 (e610 model) device with Cyanogenmod 10. When I connect the phone to a computer with Linux (I have mtpfs installed), I can see both internal storage and the SD card. However when I ...
11
votes
11answers
65k views

Galaxy S3 is unable to transfer files over USB: “USB device not recognized”

I have Galaxy S3 with baseband version I9300XXLFB and I'm having problems when it is connected to the PC. I cannot transfer or retrieve any files or data over USB. When I plug it in to my PC, it ...
11
votes
6answers
48k views

Using Droid as a computer microphone via USB?

Is it possible to use my Droid as a computer microphone (for Skype, Teamspeak, etc) via the USB cord? If not, does anyone know of a Teamspeak client app? Any help would be appreciated.
11
votes
1answer
3k views

Android USB reverse tethering: How to fool the apps

USB reverse tethering = Cellphone gets network connection from PC via USB. I know how to do USB reverse tethering except for one problem: Many Android apps will check network connection using the ...
11
votes
3answers
17k views

What's the difference between “sd card” and “usb storage”?

Under Settings -> Storage, I see entries for both "SD card" and "USB storage". What's the difference? What should I be using each of those for? In addition, how can I control what data goes where? ...
11
votes
5answers
11k views

Drive letter for MTP connection under Windows

In Android 3 the connection to PC as Mass Storage Controller feature was removed. Is there a way to access MTP-mounted phone as a drive letter? I want standard file manager programs (e.g. Total ...
10
votes
7answers
1k views

Can I turn my Android device into a webcam?

If so, how? Could it be implemented via a USB, Bluetooth or Wi-Fi connection?
10
votes
1answer
11k views

What is JTAG in regards to Android?

I see the term JTAG used for reviving dead Android devices that otherwise don't respond to anything and aren't seen when USB connected. It seems that it's something done from the physical hardware ...
9
votes
1answer
31k views

My Mac doesn't recognize my Galaxy S2 through USB

My Snow Leopard Mac doesn't recognize my Samsung Galaxy S2 for file transfer over USB, and it's starting to drive me nuts. I've tried the following: Connect Storage to PC Settings > Wireless and ...
9
votes
2answers
6k views

How do I disable the USB Connected notification?

Every time I plug in my phone, I get a notification for USB connected. Is there any way to disable the notification, without disabling USB debugging? Phone: LG Optimus S Carrier: Sprint Android: ...
9
votes
3answers
871 views

Lots of “Input/output error” after connecting Samsung Galaxy S2 via USB

I'm trying to connect my Samsung Galaxy S2 (GT-9100, Android 2.3.4, I9100XXKI1) with my Linux box (Ubuntu 11.10 oneiric). I'm using the USB storage mode (Settings ➔ Wireless and network ➔ USB ...
9
votes
4answers
4k views

Disable USB charging

For some reasons not related to the battery life, I need to disable the battery charging when a USB host is connected to my phone (a rooted Nexus 4). Taking a look around on the internet (link1, ...
8
votes
2answers
538 views

Other manufacturer's USB data cable for charging?

Is there any harm in using a USB data cable of any other phone (say LG) for charging up a Nexus S? "Any harm" here means will it adversely effect my battery life or the Nexus S device in any way?
8
votes
8answers
33k views

Use an Android tablet as a Wacom drawing tablet for a PC?

Since a nice Wacom tablet is a bit pricey, especially for someone like me who doesn't do much graphic editing, I was wondering if it is possible to use a tablet (i.e. my Nexus 7) as a Wacom-esque ...
8
votes
5answers
4k views

Is there a quick-fix for the Galaxy Nexus when it signals “charging” without beeing connected via USB?

My Galaxy Nexus goes into charging mode but when it isn't plugged in. The battery symbol then indicates a charging and when in suspend mode, the display turns on which drains battery rapidly. I am ...
8
votes
2answers
3k views

How can I “right click” with a USB mouse on Android 3.1?

I've got a Logitech USB mouse and keyboard plugged into my Xoom, which is running Tiamat 1.4.4 kernel on top of Android 3.1. Both are recognized and provide input correctly, but I noticed that the ...
7
votes
3answers
1k views

Can I recharge my Android smartphone at any USB port?

My girlfirend has just installed a new CD Player on her car that comes with a USB port to connect external devices(Flash card, external hard drive, etc). My question is based due the fact that I told ...
7
votes
8answers
2k views

How to type SMS in a full sized keyboard?

The only way I have to send SMS is through my Android Phone, since I don't have a GSM/3G modem. I would like to use my Desktop's keyboard to type those SMSes. Is there any application that would ...
7
votes
2answers
20k views

My screen got broken, how to see on the computer what I'm doing in my device?

My Android device screen got broken and I can't see what I'm doing. That's the only wrong thing with my device, the rest is apparently working OK. Is there any way to send my device screen to my ...
7
votes
1answer
1k views

Does the Asus Transformer have any USB ports?

Does the Asus Transformer have any USB ports? I know that the available keyboard dock has 2 USB ports, but does the tablet itself have any?
7
votes
8answers
15k views

ADB constantly disconnects, shows device offline

I'm not 100% sure if this should go here or the main Stack Overflow, but I decided to go with this area in hope I might catch someone with more specific experience with a similar problem. I have a ...
7
votes
2answers
745 views

Every time I plug in my phone via USB it automatically mounts the SD card

I have a Motorla Droid running CM6 (essentially Android 2.2). I'm connecting to Windows 7 machines via USB. Every time I plug in my phone via USB it automatically mounts the SD card as external ...
7
votes
2answers
907 views

Optimal Linux Distro to Install to SD card to use as USB-Bootloader for PC?

Many people install Linux-based distros on USB drives to use for, largely, basic PC troubleshooting. Has anyone tried installing such a thing on their Android phone's SD card? That way instead of ...
7
votes
10answers
28k views

Galaxy S2 not recognized by computer

When I try to connect my Galaxy S2 device to my computer via USB, I get an error saying that the device has malfunctioned and is unrecognized. It appears as "Unknown device" in device manager. I'm ...
7
votes
3answers
384 views

Touch input does not work right when phone is plugged in

Basically touch input either doesn't work at all, or works erratically. This includes the the lock screen too. It happens both plugged in to a USB port or to the outlet. I've had this problem on ...
7
votes
3answers
1k views

Android phone not recognized in Ubuntu

I have an Android Phone (a Motorola Milestone) and trying to connect it to my Ubuntu Maverick (10.10). The problem is that i can't even charge it using USB, so there's no message on the phone nor on ...
7
votes
1answer
1k views

Multiple USB Storage Devices on Honeycomb

I just got an Acer A500 tablet, which has a full size USB port and supports FAT32 USB storage devices. What I would like to do though, is hook up a hub and connect multiple, so use the tablet as a ...
6
votes
4answers
354 views

Is the Nexus One battery charged when connected to a PC via USB?

Do you happen to know whether the Nexus One's battery is charged while being connected via the USB cable to a PC? If so, is this standard behavior for all Android devices that have a USB port?
6
votes
5answers
35k views

Any success with external microphones for Android phones or tablets?

What's the best way to record a video with high quality audio? Specifically, this is for a presentation where a microphone could be placed by the speaker. I know that an app that records with the ...
6
votes
7answers
19k views

How do I get my phone to connect the internal SD by USB?

I recently rooted and upgraded my Samsung Galaxy S2 to version 4, ICS. Since doing so, when I connect my device by USB to my Ubuntu computer, only the 12GB internal storage shows up on my desktop and ...
6
votes
2answers
1k views

Can a charger not 100% compliant to the USB specification damage my Andoid phone?

I've bought a world adapter which can charge USB devices as well. According to the packing the usb will be powered with more than the 500mA as per USB specification - 1000mA. Will charging my HTC ...
6
votes
2answers
3k views

How to shutdown android phone from PC

The screen of my android phone sometimes automatically shutdown and cannot reshow again. So how can I shutdown my android from PC or other ways?