Develop Bugs

USB doesn't work???

Can someone please help? I just bought a used P3300 from ebay (a wholesaler). The phone works great, absolutely everything works except for the activesync over USB. The phone is not even seen by the computer with or without activesync. I have tried it on several computers with the same issue, yet the battery charges through the USB cable.
I even reflashed the ROM using the SD card method and still have the same issue. What might be going on here??? How can the USB data connection be not working? I've never experienced this with many different phones I've had.
thanks,

Go to Settings, Connections, USB to PC, and untick Enable advanced network functionality.

I tried that, it didn't make a difference. I also tried both Activesync 4.5 and 4.2. Still nothing. I hard reset and soft reset several times - still nothing.

What Firewall is on your PC. Could be this causing the hassle.

Have you tried using a known-working usb lead?

I had this problem also to begin with, google an application called "USBKILLER" and put this .CAB onto your memory card and load this onto the phone.
When your in the application select SERIAL and click YES and this should resolve your problem - I am not sure why this happend but my mate who has the same phone does not have this problem and can resolve it by removing the check box in USB to PC settings

hey guys.... thanks for the input. My firewall is disabled - I read the Microsoft article regarding the ports Activesync uses. But AS works with my other phones, so I know that's not the problem. Same thing with the USB cable. It works with the other phones but not this one.
nicko666, I will try that USBkiller program later tonight. Thank you for the suggestion. I'll let everyone know how it goes.

Found USBkiller Cab File Attached - good luck

I tired the USBkiller program (found it myself earlier) but it also doesn't make a difference. I tried changing the setting to SERIAL in the program and also playing with the "advanced network functionality" and activesync connection settings and it's a no-go.
Still nothing works. Do I have a broken device?

hardware problem
i had the same problem after 1 month of using my p3600 i pay 59 euro to change it because the garanty not include this problem.the service told me that it was my fault !!!!

Hello. Is your PPC detected by Windows in the manager of peripheral? It is necessary that you look at if you have a new network card named "Windows Mobile".

I had that problem. I am sorry, but I think you bought a used and not-functional phone. The problem is probably due to high power that the phone got, probably when charging it through a car-charger. You should NEVER connect the phone to a car charger and then start the car - the power can damage the USB connection. You should always first start the engine and only then connect the phone to the charger.
Anyway, I had the same problem - the USB could charge the phone, but no Active Sync connection. I sent my phone to HTC UK, and after one week I got it back with a new board (they replaced the whole inside of the phone). Free of charge.
If this is the situation with your phone - no software solution will help you.

Damn, that sounds like what's going on with my phone. How do I find out how to have it serviced? I can't find anything on the useless HTC site. Please help....
And thanks to you all for the help so far.
mattan said:
I had that problem. I am sorry, but I think you bought a used and not-functional phone. The problem is probably due to high power that the phone got, probably when charging it through a car-charger. You should NEVER connect the phone to a car charger and then start the car - the power can damage the USB connection. You should always first start the engine and only then connect the phone to the charger.
Anyway, I had the same problem - the USB could charge the phone, but no Active Sync connection. I sent my phone to HTC UK, and after one week I got it back with a new board (they replaced the whole inside of the phone). Free of charge.
If this is the situation with your phone - no software solution will help you.
Click to expand...
Click to collapse

I remember sending them mail regarding the problem, via HTC site (mail: [email protected]).
After all the solutions they suggested didn't work, they called me and asked me to send the phone to the UK (they gave me all the details and were very nice and efficient). I must say that my phone was still at warranty period.

this may sound silly, but have you tried the usb ports on the back of the computer?
for some reason, the usb headers on my motherboard don't seem to recongise the phone, i'm not sure if theres no enough power or what, i've onbly tried the cable in a laptop and that works fine...if i plug them in the front usb ports i get the error in windows 'Your device has malfunctioned, Replace the Device and Try Again' or something very simular, tried the other usb header on the board, same problem, back ports, no problem...all other usb devices work fine in all the ports!

Dear all.
I work for a company that has over 600 of the htc p3300. Some of them will work in the usb and some don't.
I have 4 at the moment, 2 of them will work with the usb and the other 2 won't........
Tries all the stuff mentioned here and nothing helps.
Can't update them because of the usb........
HTC are not a lot of help either......

stead said:
this may sound silly, but have you tried the usb ports on the back of the computer?
for some reason, the usb headers on my motherboard don't seem to recongise the phone, i'm not sure if theres no enough power or what, i've onbly tried the cable in a laptop and that works fine...if i plug them in the front usb ports i get the error in windows 'Your device has malfunctioned, Replace the Device and Try Again' or something very simular, tried the other usb header on the board, same problem, back ports, no problem...all other usb devices work fine in all the ports!
Click to expand...
Click to collapse
Hi I had been trying to sort this problem out too, and after reading about starting cars with the device on charge I thought I was doomed. But what stead suggests has just worked for me too. I was using the nearest USB on my laptop but plugin it in round the back has just got it working again. The last time it synced it was 'Repairing' the Active Sync 4.5 setup program run through. I must admit that the cable into the phone is also resting on a pen at the base of the phone- just to make sure....

Can't connect to a PC

Hello everybody
I got no problems in the past with the N4 and the N7 2013, but here, I'm unable to connect the N5X to my pc.
I tried to reinstall drivers (LG or google ones), but unsuccessful.
Windows 10 can't use it (error 43), and disconnect it by itself (i tried to force the drivers i want it to use, but unsuccessful).
For information, when I connect the phone, i didn't get the notification menu where you can choose which connection you want to use (charge, MTP, etc...).
I also tried debugging mode on and off. The same ****.
I suspect my USB C/A adapter . It's a cheap thing I bought on amazon for 3.99€.
Is it possible? Should I buy a cable? (i would prefer an adapter I can have on myself everyday in my wallet to be able to use with all friends cables).
Thanks.
It is that:
http://www.amazon.fr/gp/product/B01781ORKC?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

Well, it's just the adapter, i use it with the official cable. I will check that, thanks.

fruity101079 said:
Hello everybody
I got no problems in the past with the N4 and the N7 2013, but here, I'm unable to connect the N5X to my pc.
I tried to reinstall drivers (LG or google ones), but unsuccessful.
Windows 10 can't use it (error 43), and disconnect it by itself (i tried to force the drivers i want it to use, but unsuccessful).
For information, when I connect the phone, i didn't get the notification menu where you can choose which connection you want to use (charge, MTP, etc...).
I also tried debugging mode on and off. The same ****.
I suspect my USB C/A adapter . It's a cheap thing I bought on amazon for 3.99€.
Is it possible? Should I buy a cable? (i would prefer an adapter I can have on myself everyday in my wallet to be able to use with all friends cables).
Thanks.
It is that:
http://www.amazon.fr/gp/product/B01781ORKC?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
Click to expand...
Click to collapse
Adapters have known issues with working.
You need to get a usb C/A cable.
Make sure you shop around and don't get a cheap one.
It needs to meet USB C specs our you will burn out your phone and/or comp usb ports.

Yeah thanks, i just bought another adaptater (i prefer) recommanded by Benson
Thanks everyone.

HTC M9 Connecting to Computer Problem

Hey Guys,
First of all, I am a new member here my name is Salem and its an amazing forum.
Anyway, I have a slight problem with my HTC M9 while connecting it into my laptop. First, when I connect it, the mobile starts charging, and it gives me no option as to change it to Media Transfer or anything... even it gives me "Slow Charging" Error, and my laptop is detecting nothing, as if nothing happened, nor its searching for any drivers...
I went to developer menu and used USB Debugging, and selected USB configuration as MTP, and it didn't work...
I installed HTC Sync to get the drivers, and it is the same.
Can you guys help me? because I wanna root the phone and I tried various Auto Root applications without using the PC and they didn't work. Thank you guys

No signal from the laptop probably means you have a faulty USB cable. Most likely a break in one of the data wires.
Try another good quality usb 2.0 cable.
Beamed in by telepathy.

Same issue. Tried multiple cables
I have the same issue. When I try to plug into any PC a slow charging message pops up but the phone won't give me the option to connect to PC. I have turned on USB Debugging and selected MTP (Media Transfer Protocol). Please help!
I am with TPG. Android 6.0 HTS 7.0 Software number 3.35.617.12
I only bought this phone a week ago and it updated when I turned it on.

jaystarrs said:
I have the same issue. When I try to plug into any PC a slow charging message pops up but the phone won't give me the option to connect to PC. I have turned on USB Debugging and selected MTP (Media Transfer Protocol). Please help!
I am with TPG. Android 6.0 HTS 7.0 Software number 3.35.617.12
I only bought this phone a week ago and it updated when I turned it on.
Click to expand...
Click to collapse
Most likely a crap or broken cable. Other cables, other sockets, other pc's are all worth a try.
You should leave the usb port in "charging only". When you successfully connect to a pc the phone will prompt you to allow data transfers to that computer.
I know this because mine does it. I'm sick to death of the effing thing promting me to connect to my xbox one when all i want to do is charge the effing thing... My phone is set to charging only.
I suppose rom choice will affect it too. Mine is rooted stock 6.0.
Beamed in by telepathy.

Still have same problem
I still can't connect my M9 to my PC. Still have slow charge message come up and no option to connect to PC. My work around has been transferring files using WiFi. However, now I need to do a presentation using scrcpy and will probably have to get a new phone. I'm tmepted not to buy HTC again. Pretty frustrating and no fix found on the internet...

USB Connection problem

Hello!
I really hope someone can help me out on this.
I have just bought a Lenovo P2a42 and everything works fine, except that I cannot connect it to my computer via USB cable.
I tried different known working cables on different known working machines (win 7 & 10) with no success.
It looks like the phone stuck at "charge only" USB mode, the PC does not even react when phone is connected, only on the phone I can see it is charging.
So it is not a driver issue, as it looks like the PC does not even know about a phone is connected.
I tried to change USB Connection mode under Developer options, and nothing happened. However, it was strange, that if I change the USB mode from "Charge only" to MTP, after selection made, the text label under this option in the Developer options remained "charge only", and only if I go back and forth one level (to settings menu and then back to developers menu) it shows the MTP setting I have set earlier.
It is weird, but for me it looks like as the phone stuck at charge only mode, and I cannot switch between USB connection modes.
There is no notification at all about USB if I connect the cable.
I have made a factory reset on the phone, and nothing changed.
My P2 is running android 7.0.
Do you guys have any idea? I'm really desperate on this.
Thanks in advance for any tip!
Moire76

I seem to have this problem also because of the above i am unable to get adb working properly although drivers are setup.
I fixed it now by using the PDAnet program which found and installed some android drivers after which the phone is recognised properly as Lenovo p2 and is picked up in adb as attached device.

moire76 said:
Hello!
I really hope someone can help me out on this.
I have just bought a Lenovo P2a42 and everything works fine, except that I cannot connect it to my computer via USB cable.
I tried different known working cables on different known working machines (win 7 & 10) with no success.
It looks like the phone stuck at "charge only" USB mode, the PC does not even react when phone is connected, only on the phone I can see it is charging.
So it is not a driver issue, as it looks like the PC does not even know about a phone is connected.
I tried to change USB Connection mode under Developer options, and nothing happened. However, it was strange, that if I change the USB mode from "Charge only" to MTP, after selection made, the text label under this option in the Developer options remained "charge only", and only if I go back and forth one level (to settings menu and then back to developers menu) it shows the MTP setting I have set earlier.
It is weird, but for me it looks like as the phone stuck at charge only mode, and I cannot switch between USB connection modes.
There is no notification at all about USB if I connect the cable.
I have made a factory reset on the phone, and nothing changed.
My P2 is running android 7.0.
Do you guys have any idea? I'm really desperate on this.
Thanks in advance for any tip!
Moire76
Click to expand...
Click to collapse
I think it's because you must install to your PC mtp drivers.

Thanks for your answer, but unfortunately, no. As I mentioned, there is no communication between phone and PC.
With a missing driver, you can see your unknown USB device in device manager.
BTW, since then I have returned the phone to seller, and they confirmed, that the USB port of the phone is faulty (data pin connection to phone motherboard is faulty)
They are now working on the repair and will be done by tomorrow.
chtsarts said:
I think it's because you must install to your PC mtp drivers.
Click to expand...
Click to collapse

Finally I contacted seller and send it back for repair.
They confirmed that one leg of the USB motherboard connector was detached from the board.
They replaced the connector, and now it's just working as it should.
Have a nice day!
Moire76

Question S22 not visible in Windows device manager over USB -> can't transfer files

Hello,
my new S22 is not visible in device manager so there's no way to enable file transferring, only charging works when connected to my Windows 10/11 PC.
Also the "USB for file transfer" notification below is not visible at all for me:
https://imgur.com/rr13tI9
I have tried with 2 different cables and 2 different PC (Windows 10 & 11).
File transferring works fine with S21.
I have tried enabling USB debugging, and installing the latest Samsung USB Drivers from https://developer.samsung.com/android-usb-driver
I have checked the "default USB configuration" is set to "Tranferring files" and *#08080# is set to "MTP + ADB".
Only "Link to Windows" (the problem with this is you can see only 2000 latest photos) and Samsung Dex works.
Is my brand-new phone defective ?

Daimie said:
Hello,
my new S22 not visible in device manager so there's no way to enable file transferring, only charging works when connected to my Windows 10/11 PC.
Also the "USB for file transfer" notification below is not visible at all for me:
https://imgur.com/rr13tI9
I have tried with 2 different cables and 2 different PC (Windows 10 & 11).
File transferring works fine with S21.
I have tried enabling USB debugging, and installing the latest Samsung USB Drivers from https://developer.samsung.com/android-usb-driver
I have checked the "default USB configuration" is set to "Tranferring files" and *#08080# is set to "MTP + ADB".
Only "Link to Windows" (the problem with this is you can see only 2000 latest photos) and Samsung Dex works.
Is my brand-new phone defective ?
Click to expand...
Click to collapse
This may sound stupid, but flip the cable over and plug it in. Yes, I know, it doesn't (or shouldn't) matter which way you plug in a USB-C cable. Not all USB-C cables are created equal.
I've had this happen to me. It wouldn't recognize my phone, but when I flipped it over and plugged it in, it worked.
I had to go through all of my cables to check for this. I tossed the ones that caused this phenomenon. It seemed to be all of my older cables I had purchased when I had a Note 8.

Use adb push and pull

gernerttl said:
This may sound stupid, but flip the cable over and plug it in. Yes, I know, it doesn't (or shouldn't) matter which way you plug in a USB-C cable. Not all USB-C cables are created equal.
I've had this happen to me. It wouldn't recognize my phone, but when I flipped it over and plugged it in, it worked.
I had to go through all of my cables to check for this. I tossed the ones that caused this phenomenon. It seemed to be all of my older cables I had purchased when I had a Note 8.
Click to expand...
Click to collapse
This didn't work. Tried flipping the original USB-cable.

mr.herbert said:
Use adb push and pull
Click to expand...
Click to collapse
The command "adb devices" returns 0 devices.

Daimie said:
The command "adb devices" returns 0 devices.
Click to expand...
Click to collapse
Is USB debugging on?
If so did you grant the computer authorization?

My USB-C -> USB-C stopped being recognized, hade to go with USB-C -> USB for computer to recognize it again. Device is S22 Plus.

Solved! I tried a 3rd cable and it started working.
So my original S22 USB-C cable is faulty, as only the charging works.

Yes, my S22 also works with only few cables (I have tried like 10pcs including completely new ones and like 1/3 is working). Samsung is restricting from using other cables for other purposes then charging. Its not the cable fault. They are working with other phones and charging S22 properly. Its just something between heaven and hell why Samsung is trying to f*ck us and make our daily lives more complicated...

Daimie said:
Solved! I tried a 3rd cable and it started working.
So my original S22 USB-C cable is faulty, as only the charging works.
Click to expand...
Click to collapse
Do you know what brand and model cable you got working?

What specs the proper cable should have? Having the same issue.

Having the same issue. And adb connect <ip>:5555 also refused for my case