I heard there were long awaited Android updates available for my Samsung Galaxy S2 but when I went into Settings – About Phone – Check for Update, there were none. Others with the same phone and on the same network got the updates fine so I’d no clue what was up. A quick call to 3 Tech support revealed that the update might be available via Samsung Kies so I went and downloaded that and tried in vain for nearly an hour to get the computer and phone to connect either via WiFi or USB.
It turned out you need to disable USB Debugging on the phone via Settings – Applications – Development – USB debugging. See below:
Doing that and restarting both Phone and PC, then connecting the phone to the PC via USB should start Kies on the phone automatically and allow Kies on the PC to connect to it and present the full suite of options, ie – Phone Backup, Sync, Firmware Update etc..
I managed to install Android 4.1.2 Jelly Bean via Kies in the end.
Note: Turning off USB Debugging on the phone means you can’t connect it to the PC in USB mode unless you re-enable USB debugging again.