In spite of sync is disabled, sync icon is shown in notification bar forever! I am talking about Samsung Galaxy Ace Duos2 (GT-S6802). The undesirable thing is that Sync icon is always shown in notification bar. I checked Accounts and sync settings many times to make sure Auto sync is disable.



In above screen-shot you can see that Auto sync is not enabled. However, Sync icon/symbol is shown at notification area.

I also tried after enabling and re-disabling Auto sync options, restarting many times but sync icon at notification bar po-pups sometimes (1 min) after booting and remains forever.

So, Why this is happening and How do I get rid of it? (Is there any thing I'm missing?)



Note: I also tried turn-off data connection and background data as well but not succeed.
I recently had the same issue - I have an old Samsung Galaxy S with Android 2.3.6.  I think somehow an app got updated when I was on WiFi, but I didn't know what it was. I noticed a "sync" icon appeared and would not go away. 

I finally realized I could go to Settings &rarr; Applications &rarr; Battery Use, and find out that YouTube was the culprit.

Then I could force stop that app and the icon went away, but it came back after a reboot, so I also uninstalled YouTube app updates.