Step 1: Install a root-enabled file managerTo activate Wi-Fi hotspot on your Android, you need to edit the root directory of your device. There are plenty of Android file managers that you can find on the Google Play Store to get this done.
Step 2: Navigate to the Audio-UI FolderWith the root-enabled file explorer installed, head over to the root directory of your Galaxy device and open the “System” folder. Now find the “Media” folder and then open up the “Audio” folder with “UI” folder inside it. This particular folder contains all the audio tones that come with the stock TouchWiz or the ones offered by network carriers. Hence, if you want to remove boot-up sound on Galaxy S6 and S6 Edge on T-Mobile, Verizon, AT&T, and Sprint, this is the way to go.
Step 3: Rename the Boot sound fileTo edit the boot sound file, make sure that the folder is mounted as “Read/Write”. Now scroll down the folder to find the “PowerOn.ogg” file, long-press the file to see the menu pop out and then select “Rename”. From here on, simply add “.bak” to the name of the file and press “OK” to confirm your action. You can now go ahead and exit the app and reboot your device to see if you were able to remove boot-up sound on Galaxy S6 and S6 Edge.
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