[Q] How to rename android_audio.mp3 ?

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Hi !

I hate the sound when Wildfire S boots-on.
In Wildspirit ROM, I noticed that android_audio.mp3 has been renamed in android_audio.mp3.bak .The path is : \system\customize\resource\
There is no sound at boot.

My device is S-OFF and rooted with HTC Official ROM.
So I tried to rename this file with ES File Manager, but it says that it's not possible.
It's like I've got no permission to do that.
Is the file read-only ?

Is there someone who can tell me how to rename android_audio.mp3 ?

Finaly I managed to do it with Root Explorer. There is a button to switch between Read/Write Mode and Read Only Mode.

Now, no ugly sound on boot !

Hehe. I might change mine to a custom one haha.