How do I disable the bootup sound on (TMO) Samsung Galaxy S6 Edge? I have a T-Mobile Samsung Galaxy S6 Edge that I would like to disable the bootup T-Mobile 'jingle'.  How do I disable this?
1. You can use Silent Boot - Google Play 

2. also you can do this with Root access and Root Explorer :

Goto -&gt; /system -&gt; media -&gt; audio -&gt; ui


and rename this files :


PowerOn.ogg 
PowerOff.ogg



to something like this :


PowerOn.ogg.disable
PowerOff.ogg.disable



but, there's not non-root method that guarantees silence the Startup sound.