Samsung Galaxy S 2 will not sync with my PC.

I have this problem sometimes and have come to realise it is usually caused by the PC using the wrong driver for the device. The device manager in Windows lists hardware and what drivers are installed. This may help you see what driver the device is currently using.

I have downloaded the correct drivers for my dtevice and have installed them correctly. I have noticed that sometimes Windows will update the usb driver for my device and install their own microsoft driver which causes the device to not be recognized by pc, but allows you to charge the device. I fix this problem in device manager by uninstalling the device. Next I reboot the operating system and the PC usually will install the correct drivers and my device is again recognized on the PC.

So make sure you are using the correct drivers for your phone or the PC will likely not recognize the phone and will only charge it's battery. Make sure you have the proper cable too.

Sounds like either the cord your using is for charging only or your computer does not have the necessary drivers to talk to the phone. Try using a different cord first. Then use a different USB outlet. If still no then we got to get a little more technical.

Well, I'll be damned (I line I got from the move Hunt for Red October); the solution is EASY -- just use a different USB cable! I just had this same problem -- connected my Smartphone to my computer via a USB cable and expected the Smartphone to show up on my computer as a Portable Device -- just as it had done in the past; but NOTHING happened! My phone showed that it was charging, but there was no connection with my computer. Finally, I went and got another USB cable and used it. EVERYTHING WORKED FINE!!! The phone showed up on my computer -- with all the folders and files. Just to test, I tried the first USB cable again -- NOTHING (except charging)! Used the other USB cable, and everything works just fine! I have absolutely no idea why the CABLE makes the difference; the only noticeable difference is that the first cable wire is thin, and the second cable wire is thick -- why that would make any difference, I don't know. Now, I know -- just use a USB cable that works!

Reboot the computer and remove battery from phone unplug usb then restart computer when it is booted back up put battery back then turn phone on then try connecting it! make sure if it asks what type of connection you select either disk drive or usb not usb tethering!

use this code *#7284# and select pda instead of modem. the phone will restart and it will work

this one worked also on my new samsung J5

Go to dial pad & type *#0808#

It displays USB settings

Select MTP+ADB option

Press OK button

Connect to USB cable to PC

It shows Connected as a media device."

Found this and it worked like a charm baby!!! These guys are experienced app developers, thus they know more than us lol

10/09/2015 by Ian Reid

Thank you for helping. I tried everything and nothing worked. Come to find out my usb connection on the phone was broke. Went to att and they had another sent to me.

Is a data cable also able to charge devices?

For those who are still having problem of phone / tablet not working on computer. I had same problem that I kept tackling and somewhere found this solution on the internet. Try disconnecting phone from computer. Turn on Airplane mode and reconnect phone to computer. I had gone through sooooo many posts and installing /removing apps before seeing the post about Airplane mode. It worked for me when no other solution worked. After computer recognized the phone and was mounted for file transfer one time, I was then capable of connecting phone without turning on Airplane mode. Connection has worked for me ever since.