Help What Firmware Upgrade is this ?

[augustya]

Hi Guys,

Can someone please tell me what version of Android is this ? I currently have Android ver.2.3.3 and on my Samsung Galaxy S2 I am getting a prompt on Kies for a Firmware Upgrade which has a version number PDA:KL1 / PHONE:KL1 / CSC:KL1(INU) and My Current is PDA:KF3 / PHONE:KE4 / CSC:KF3(INU).

is this Android ver.2.3.x ? What Android version is this ? And what are the major improvements, changes in this version since the 2.3.3 ?

Thanks