Firmware Version

Hi,

My phone is "Sony Ericsson Xperia Arc S (LT18i)"

I want to backup my existing firmware but I'm bit confused in Firmware Version as Service Info -> Software Info contains lots of info!

Software Info:
Phone Software Version: 1253-8238_4.0.2.A.0.62 GENERIC - user
File System Version: WORLD-i_4.0.2.A.0.62
S1 Boot Version: 1241-3656 R9B031
ETS Software Version: 1252-2923_1028e
Customization Version: 1225-2284_R2D
Active Customization: 1225-2284_R2D

Can you please throw some light upon these terms?

Also please tell me which of the above lines contains my phone firmware version.

Thanks & regards,

Maria.

from xda-developers http://ift.tt/1ZD8PNF
via IFTTT