Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
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USB connection type pop-up not showing
The main reason I am loyal to Android is it was always easy to plug my phone into my Windows PC and transfer files. Recently, my phone is not recognized by my PC. It doesn't even give me the menu on my phone to pick what to do when connected (charge, transfer files, etc.). In the settings on my phon...
The main reason I am loyal to Android is it was always easy to plug my phone into my Windows PC and transfer files. Recently, my phone is not recognized by my PC. It doesn't even give me the menu on my phone to pick what to do when connected (charge, transfer files, etc.). In the settings on my phone, everything is greyed out.
I also think this is causing Android Auto not to work in my car. Others have tested their phones and can connect to the radio instantly. I have searched the settings and developer options and can not find which setting is incorrect.
I also think this is causing Android Auto not to work in my car. Others have tested their phones and can connect to the radio instantly. I have searched the settings and developer options and can not find which setting is incorrect.
tagliaboo
(1 rep)
Jan 12, 2024, 09:16 PM
• Last activity: Aug 29, 2025, 08:40 PM
3
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1
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5253
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how can I usb tether between two android phones
I want to access the internet connection of my first android phone with my second android phone, via usb. I am sensitive to wifi/network radiation emissions, so I want to connect the first phone via wifi or 3G network to the internet, and have internet access through a long usb cable, from my second...
I want to access the internet connection of my first android phone with my second android phone, via usb.
I am sensitive to wifi/network radiation emissions, so I want to connect the first phone via wifi or 3G network to the internet, and have internet access through a long usb cable, from my second phone, set on airplane mode.
I have a Galaxy S2 HD LTE SHV-120S Android version 4.0, rooted and stable
The second phone I have yet to purchase.
Are there apps to enable this? Drivers?
Babak Kardan
(161 rep)
Mar 25, 2015, 04:11 AM
• Last activity: Jul 29, 2025, 09:22 PM
2
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1
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5203
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Android system keeps resetting default USB configuration upon PC connection
Whenever I'm connecting my Samsung Galaxy A40 running Android 9.0 to a laptop or PC, I'm getting an annoying prompt to allow data transfer, and the following setting which I had set to "Charging phone only" gets reset to "Transferring files": [![enter image description here][1]][1] However, I only w...
Whenever I'm connecting my Samsung Galaxy A40 running Android 9.0 to a laptop or PC, I'm getting an annoying prompt to allow data transfer, and the following setting which I had set to "Charging phone only" gets reset to "Transferring files":
However, I only want to charge the phone and absolutely never allow data transfer for security reasons as I frequently have to connect my phone to public or workplace PCs for charging. The service which throws the notification/prompt is called *Android System* and the icon looks a bit like this (only with filled font):
I activated developer options and explicitly configured the USB connection settings to **not** allow data transfer. Why does *Android System* keep changing my settings and prompting for data transfer? Is this normal behaviour? Is there a way to regain control without having to root the device?
However, I only want to charge the phone and absolutely never allow data transfer for security reasons as I frequently have to connect my phone to public or workplace PCs for charging. The service which throws the notification/prompt is called *Android System* and the icon looks a bit like this (only with filled font):
I activated developer options and explicitly configured the USB connection settings to **not** allow data transfer. Why does *Android System* keep changing my settings and prompting for data transfer? Is this normal behaviour? Is there a way to regain control without having to root the device?
david
(141 rep)
Mar 16, 2020, 06:15 PM
• Last activity: Jul 2, 2025, 05:06 AM
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0
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52
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How to output Android head unit Bluetooth call sound to USB DAC?
I am trying to use a USB DAC with my Android head unit. While it works well with most apps, it doesn’t output sound when making Bluetooth calls. I did some research, and it’s said that because the mic is used during the calls, the system handles the sound differently. It mentions that there should b...
I am trying to use a USB DAC with my Android head unit. While it works well with most apps, it doesn’t output sound when making Bluetooth calls. I did some research, and it’s said that because the mic is used during the calls, the system handles the sound differently. It mentions that there should be settings to force the Bluetooth call sound to be output through USB. However, I couldn’t find the settings and also couldn’t use apps mentioned like Lesser AudioSwitch, for they are not supported in Android 9 and later.
Anyone can help shed some light on the matter? Much appreciated.
WX369
(1 rep)
Jun 1, 2025, 10:42 PM
• Last activity: Jun 4, 2025, 11:49 AM
0
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0
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26
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Character driver device nodes not listing in Android
Three devices, created using a character driver (`/dev/device1`, `/dev/device2`, and `/dev/device3`), are not appearing in Android (AOSP 15). However, the same character driver functions correctly under Linux (via udev). The matching rule is included in ueventd.rc, and permissions have been enabled...
Three devices, created using a character driver (
/dev/device1, /dev/device2, and /dev/device3), are not appearing in Android (AOSP 15). However, the same character driver functions correctly under Linux (via udev).
The matching rule is included in ueventd.rc, and permissions have been enabled through the SELinux policy.
Here is the file contents
ueventd.rc
/dev/device[0-9]* 0660 system system u:object_r:vendor_device:s0
my_device.te
type vendor_device, dev_type, mlstrustedobject;\
allow system_app vendor_device:chr_file { read write open ioctl };
user1092408
(1 rep)
May 16, 2025, 04:46 PM
• Last activity: May 16, 2025, 11:05 PM
7
votes
1
answers
10668
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How to access "Work Profile" files via USB on my PC
I've got an Android "Work Profile" on my phone, kind of setup [as explained here](https://blogs.vmware.com/euc/2017/12/android-byod-how-i-use-the-work-profile.html). It's trivial to access normal Android files. Plug a USB cable into my phone and PC, select "File Transfer" and my files show up in Win...
I've got an Android "Work Profile" on my phone, kind of setup [as explained here](https://blogs.vmware.com/euc/2017/12/android-byod-how-i-use-the-work-profile.html) .
It's trivial to access normal Android files. Plug a USB cable into my phone and PC, select "File Transfer" and my files show up in Windows Explorer. Is it possible to access my "Work Profile" files in the same manner? I don't see any path to them in Windows Explorer when connected (to Android 11) via USB. I'm guessing this access may not be possible.
Display name
(313 rep)
Sep 18, 2020, 06:48 PM
• Last activity: Apr 19, 2025, 11:06 AM
0
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1
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231
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How I can USB passthrough WiFi card into Android emulator as I do upon on other hypervisors?
I managed to run an Android emulator: ``` $ emulator Android30 INFO | Storing crashdata in: /tmp/android-pcmagas/emu-crash-34.2.14.db, detection is enabled for process: 93905 INFO | Android emulator version 34.2.14.0 (build_id 11834374) (CL:N/A) ERROR | No AVD specified. Use '@foo' or '-avd foo' to...
I managed to run an Android emulator:
$ emulator Android30
INFO | Storing crashdata in: /tmp/android-pcmagas/emu-crash-34.2.14.db, detection is enabled for process: 93905
INFO | Android emulator version 34.2.14.0 (build_id 11834374) (CL:N/A)
ERROR | No AVD specified. Use '@foo' or '-avd foo' to launch a virtual device named 'foo'
$ emulator -avd Android30
Dimitrios Desyllas
(143 rep)
Jun 7, 2024, 06:01 PM
• Last activity: Apr 19, 2025, 07:48 AM
0
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3
answers
1750
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Nexus 7 (2013) OTG cable with flash drive doesn't work
I just bought a Nexus 7 (2013) and an OTG cable. I wanted to connect a flash drive to it. When I connected it, nothing happened. I tried to find the folder with my flash drive contents in `/etc` - there was nothing about my flash drive. I searched in `/storage/emulated/0` - there were contents of my...
I just bought a Nexus 7 (2013) and an OTG cable. I wanted to connect a flash drive to it. When I connected it, nothing happened.
I tried to find the folder with my flash drive contents in
/etc - there was nothing about my flash drive. I searched in /storage/emulated/0 - there were contents of my internal SD card. I downloaded some applications from Google Play (e.g. Nexus Media Importer, OTG disc manager). It worked, but only for reading.
Is there a way to write to my flash drive? Please notice that I DON'T want to ROOT.
Kazarp
(1 rep)
Feb 12, 2014, 05:03 PM
• Last activity: Apr 18, 2025, 04:08 PM
6
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1
answers
21715
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How to do port forwarding over Android USB tethering?
So, for the time being I'm stuck plugging my phone into my PC and using USB tethering to connect to Wi-Fi. One of my games requires port forwarding for online play, and I'm having trouble getting it to connect. I've gone to my router settings and forwarded the appropriate ports from the phone's inte...
So, for the time being I'm stuck plugging my phone into my PC and using USB tethering to connect to Wi-Fi.
One of my games requires port forwarding for online play, and I'm having trouble getting it to connect. I've gone to my router settings and forwarded the appropriate ports from the phone's internal IP address, but still nothing. Here are the ports needed in case it helps:
- DirectPlay7 47624 47624 TCP/UDP
- DirectPlay8 6073 6073 UDP
- DPlay7&8 2300 2400 TCP/UDP
- Outlaws 5310 5310 TCP
I've also been fiddling with Telnet and ADB, but to no effect. Any suggestions?
ChelonianEgghead
Jun 19, 2019, 05:32 PM
• Last activity: Apr 12, 2025, 07:02 AM
0
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1
answers
707
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Enable USB debugging from recovery mode on phone with unresponsive screen, stock recovery, not rooted, adb not connecting
First of all, I know there are already tens of similar questions, but none seem to be my exact scenario. And every solution gets me stuck because something does not line up with my case. I have a Samsung A70 phone that I'm trying to recover data from after the screen stopped responding to touches. E...
First of all, I know there are already tens of similar questions, but none seem to be my exact scenario. And every solution gets me stuck because something does not line up with my case.
I have a Samsung A70 phone that I'm trying to recover data from after the screen stopped responding to touches. Eveything else works.
I want to be able to project the phone to my laptop and control it using some app or scrpy. However, USB debugging or developer mode was never enabled from settings and now I can't access the settings to enable it.
I managed to boot the device into recovery. It was never flashed with any custom OS or custom recovery. I saw some posts suggesting I can use adb commands to enable USB debugging. However, when I connect the device via a USB cable to my laptop, the device shows up in Device Manager, but
adb devices does show it. When I go into recovery mode, the device no longer shows up in Device Manager and adb devices still doesn't work. The only way that seems to make adb devices show it is when I put the device into sideload mode. But I don't think that is helpful, cause I don't want to flash any custom ROM as my ultimate target is to recover the data from the phone.
Also, if relevant, the phone is not blocked, it does not have a password or PIN.
I'm stuck. What can I do?
Stefan Octavian
(101 rep)
Jul 21, 2024, 03:33 PM
• Last activity: Mar 27, 2025, 11:19 PM
1
votes
1
answers
281
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Android doesn't detect USB connection
The standard remedy would be to try changing cables (some are power only with no data), and try changing the connection modes (File transfer / Android Auto, USB tethering, MIDI, PTP, etc.). Having tried both, my device still won't display the ADB Debugging notification. It manages to receive charge,...
The standard remedy would be to try changing cables (some are power only with no data), and try changing the connection modes (File transfer / Android Auto, USB tethering, MIDI, PTP, etc.).
Having tried both, my device still won't display the ADB Debugging notification. It manages to receive charge, but nothing I do seems to get it to respond to being connected to a PC. Wireless ADB doesn't seem to be working either, the PC side being unable to find anything.
I know for a fact that my cable is capable of data transfer, as I've used it before. I've tried changing it anyway, in case my cable has degraded. No luck.
I cycled through all the USB connection modes. No luck there either, they're all identical to "No data transfer", but at least in that case I would get the option to change the mode.
Is there anything else I can do?
404 Name Not Found
(245 rep)
Feb 20, 2025, 07:17 AM
• Last activity: Feb 24, 2025, 12:19 AM
5
votes
1
answers
804
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How to export Recorder audio files to PC via USB while staying offline?
I have a Pixel 6. I used the built-in [Recorder][1] app. [![Recorder][2]][2] My wifi is currently disabled, and I don't want to enable it, and I don't want my audio recording synched to the cloud. I plugged my phone into my PC via USB but when browsing the folders of files can't find the audio clip....
I have a Pixel 6.
I used the built-in Recorder app.
My wifi is currently disabled, and I don't want to enable it, and I don't want my audio recording synched to the cloud.
I plugged my phone into my PC via USB but when browsing the folders of files can't find the audio clip.
Where / how can I find the audio file?
My wifi is currently disabled, and I don't want to enable it, and I don't want my audio recording synched to the cloud.
I plugged my phone into my PC via USB but when browsing the folders of files can't find the audio clip.
Where / how can I find the audio file?
Ryan
(623 rep)
Feb 22, 2025, 07:03 PM
1
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0
answers
332
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Wired earphones not recognised
I have a pair of AKG wired earphones (USB-C - no adapter needed) and they will not connect to my phone (Samsung S22 Ultra) Currently whenever I plug them in they seem to be recognised as a USB connector and thus will get this notification: [![notification appearing when earphones are connected][1]][...
I have a pair of AKG wired earphones (USB-C - no adapter needed) and they will not connect to my phone (Samsung S22 Ultra)
Currently whenever I plug them in they seem to be recognised as a USB connector and thus will get this notification: 
I have tried a number of fixes from suggested by various forums and the issue still persists
Fixes I have attempted:
- Restarting phone
- Updating phone to latest version (as of time of post)
- Force stopping 'Android system'
- **Ensured that 'disable USB audio routing' in developer options was turned off**
- Changed my default USB configuration settings in developer options (currently selected charging phone only)
I have also confirmed that this was not an issue with the earphones themselves as I have tested them on a friends phone as well as my laptop and they seem to work fine with other devices.
Any help would be appreciated
I have tried a number of fixes from suggested by various forums and the issue still persists
Fixes I have attempted:
- Restarting phone
- Updating phone to latest version (as of time of post)
- Force stopping 'Android system'
- **Ensured that 'disable USB audio routing' in developer options was turned off**
- Changed my default USB configuration settings in developer options (currently selected charging phone only)
I have also confirmed that this was not an issue with the earphones themselves as I have tested them on a friends phone as well as my laptop and they seem to work fine with other devices.
Any help would be appreciated
nothanks
(11 rep)
Nov 8, 2024, 05:13 AM
• Last activity: Feb 18, 2025, 11:11 AM
0
votes
1
answers
1654
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Is there a way to prevent any USB data transfer for locked Samsung devices?
Just like iPhones are pretty hard to get into once they are locked, due to USB being completely disabled, is there something similar for Samsung, or any Android at all? This prevents many exploits from being applied to a locked device. What about prevent from entering DFU mode or any similar mode?
Just like iPhones are pretty hard to get into once they are locked, due to USB being completely disabled, is there something similar for Samsung, or any Android at all?
This prevents many exploits from being applied to a locked device.
What about prevent from entering DFU mode or any similar mode?
Poperton
(112 rep)
Nov 10, 2024, 05:20 PM
• Last activity: Feb 15, 2025, 02:29 AM
0
votes
1
answers
2292
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Change default camera to USB camera
I'd like to know how to change the default camera on Android to a USB camera, I'd like to use my webcam to authenticate QR codes, but with emulator, the camera doesn't start, I can only get video through a USB camera (v4l2) > ![Error opening the camera through app][1] ![It works on USB camera app][2...
I'd like to know how to change the default camera on Android to a USB camera, I'd like to use my webcam to authenticate QR codes, but with emulator, the camera doesn't start, I can only get video through a USB camera (v4l2)
> 
I'd like to make WhatsApp recognize a USB camera.
I'd like to make WhatsApp recognize a USB camera.
Arthur Breguez
(1 rep)
Jun 17, 2022, 02:30 PM
• Last activity: Feb 13, 2025, 01:47 PM
55
votes
10
answers
425712
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 drawing tablet when connected to a Linux computer? I did a bit of searching, however most of the info I...
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 drawing tablet when connected to a Linux computer?
I did a bit of searching, however most of the info I found is for using a Wacom tablet on an Android device. I've never used a Wacom device, however I have been doing some graphic editing in Gimp, and think it would be much easier than just using a mouse. And since I have a Nexus 7, it seemed like the logical place to start. I would have to use the Nexus as a USB peripheral for the computer, and I don't know if it is possible to transmit the touch screen coordinates to the PC.
If anyone can point me in the right direction, I'd appreciate it!
Garrett Fogerlie
(705 rep)
Mar 6, 2013, 04:10 PM
• Last activity: Feb 5, 2025, 02:54 PM
0
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0
answers
65
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cannot start video capture another app may be using the mic
My camera app works normally with the built in microphone. When I try to record using a plugged USB microphone it triggers this error when I click to start recording: >cannot start video capture another app may be using the mic To make sure no other app is using the microphone I removed all other ap...
My camera app works normally with the built in microphone. When I try to record using a plugged USB microphone it triggers this error when I click to start recording:
>cannot start video capture another app may be using the mic
To make sure no other app is using the microphone I removed all other apps permissions to use this resource and leave it only for the camera but still the error happens. Any idea about why is it happening and how to solve it? I want to record videos using the usb microphone.
extra info: It is a **Moto G84** with **android 14**.
Fnr
(173 rep)
Jan 20, 2025, 12:27 PM
0
votes
0
answers
53
views
Why does the USB flash drive stop working when USB debugging is enabled?
I have two TCL TVs (one with Android TV and one with Google TV installed). In both cases, the USB drive becomes invisible to the TV software if I enable USB debugging. What could be the reason? Can I fix it somehow from my side? For example, by sending some `adb` command?
I have two TCL TVs (one with Android TV and one with Google TV installed). In both cases, the USB drive becomes invisible to the TV software if I enable USB debugging.
What could be the reason?
Can I fix it somehow from my side? For example, by sending some
adb command?
LA_
(281 rep)
Jan 15, 2025, 12:00 PM
2
votes
1
answers
5091
views
Force USB Host Mode
I am trying to use an USB-serial device that has USB-A connector via USB OTG. How do I "force USB host mode" so I can use USB-A to USB-C cable instead of using OTG adapter? OTG works fine with other devices such as sd-card to type c adapter Rooted Pixel 1 with Android 10
I am trying to use an USB-serial device that has USB-A connector via USB OTG.
How do I "force USB host mode" so I can use USB-A to USB-C cable instead of using OTG adapter?
OTG works fine with other devices such as sd-card to type c adapter
Rooted Pixel 1 with Android 10
Phalelashvili
(21 rep)
Apr 11, 2020, 12:32 PM
• Last activity: Dec 20, 2024, 03:00 PM
4
votes
3
answers
3585
views
How can I `adb pull` a large file when the USB connection breaks continuously?
I want to transfer a large file with `adb pull`, but my USB connection disconnects all the time, interrupting the transfer. How can I make this work?
I want to transfer a large file with
adb pull, but my USB connection disconnects all the time, interrupting the transfer. How can I make this work?
user1156544
(141 rep)
Mar 23, 2018, 06:28 PM
• Last activity: Dec 19, 2024, 09:32 PM
Showing page 1 of 20 total questions