Why doesn't silent Boot App Work?

[Android Central Question]

Samsung AT&T prepaid phone Why doesn't Silent Boot App work? I had a ZTE AT&T prepaid phone silent boot worked well on. Why not on the Samsung J3 ?
Thanks

 

[B. Diddy]

Welcome to Android Central! The app description says it's not guaranteed to work on all phones. You can try emailing the developer to see if they can modify it to work on your phone: mail@antweb.me