Debranding W995

Hello!

Anyone know how to debrand W995? Still a newbie!

Bought Asian phone with Facebook shortcut key on front left button and want to remove or replace it. Euro version is different and doesn't have that shortcut!

Bought in HK in reliable phone shop and it's GENUINE, just Asian version as I found out that the Facebook key is on Asian versions (so far, unless someone states otherwise)!
Phone is Unlocked and NOT connected with Any phone carriers!

Any methods of Unbranded? Which softwares? How to Unbrand?

Thank you!

With A2 uploader , u 'll find tutorial here:A2-DB3150 Flashing - Top Sony Forums

how can i do the opposite? i want the integrated facebook version, i know how to flash but which FW and FS to use for the FB app?