Contacted the customer support and they told to hard reboot the mobile. It worked for me. Please backup all your apps, contacts etc using Kies before doing a hard reboot as it will restore the mobile to it's factory settings. It is a pain but had to do it to get my phone back working.
Manu 2012-12-03 08:09:14Z
我相信你的意思是“硬重置”或“出厂重置”对吗？在Android上下文中，硬“重启”一般意味着持有特定的按钮或拉动电池以强制手机重新启动 sloosecannon 2014-05-20 12:34:38Z, License: CC BY-SA 3.0
I believe you mean "hard reset" or "factory reset" right? In an Android context, hard "reboot" generally means holding a specific set of buttons or pulling the battery to force the phone to reboot sloosecannon 2014-05-20 12:34:38Z, License: CC BY-SA 3.0