How to repair the USB connection problem on Android Samsung phones
Several Samsung Galaxy phones seem to have USB connection problems. Sometimes the USB connection
stops working and even rebooting the phone does not solve the problem. This article gives the symptoms and explains how to fix that.
SymptomsIt took me a long time to figure out and fix the problem (looking at many forums, trying many solutions that never worked). The problem was not a driver problem on the PC, nor some dust on the USB connector but really a software/configuration problem on the Android phone itself. The symptoms were the following:
- The phone is correctly configured in
Settings -> Applications -> Development to USBmode (no development)
- Plugging and unplugging the USB cable does not produce any event on the phone (it is as though you plug the charger: no USB icon in the status bar)
- Rebooting the phone has no effect. USB is still not recognized (the USB icon does not appear in the status bar).
- Rebooting the phone with the USB cable connected to the PC is better. The USB icon appears but it never disappears after unplug and the connection still does not work.
- Under Windows, Samsung Kies tries to connect but the connection process never ends. Windows sees the USB device.
- Under Ubuntu, the
dmesgcommand reports an error when the USB cable is plugged:
Resolution1. Unplug the USB cable
2. On the cell phone, dial the following number: *#7284#
Once the last # is hit, the PhoneUtil application is launched. Choose USB -> Modem and then USB -> PDA mode.
The good mode should be PDA. Even if the mode is PDA, switch to Modem and then back to PDA.
3. Plug the USB cable.