Xperia 1 start sound - turn off

[fredriksolborg]

Hello,

Is it possible to turn off the start sound that appears when I turn on my Xperia 1?

It is the sound that appears when I should write the pincode for my simcard to login in to the mobile.

Thanks in advance and best regards Fredrik

[Lord_viridis]

Mines uk, 

Was o2 UK handset but had no startup sound...

Weird