Made by DevShaJok.
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a simple mod that automatically turns off the radio when entering vehicles while still allowing you to change to another station if desired, upon exiting the vehicle the script repeats.
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Enjoy having the radio off by default while still being able to listen to music if you want to.
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to install simply put "Radiooffbydefault.csa" into com.rockstargames.gtasa in the android/data folder.