Android version issues

I'm having problems with a project. I configured a button to turn the sounds on and off, it works on the pc, but when I put it on the phone it only works if I click on two places at the same time on the touch, if I just click the button it recognizes the ringtone, but type turn the sound back on) ...

    case TouchPhase.Began:
        som = true;
        gameObject.GetComponent.<AudioSource>().Play();
        player_controle.ativarSom = 2;
        som = false;

    break;

if (ativarSom > 1){
    PlayerPrefs.DeleteKey("caso1");
    PlayerPrefs.DeleteKey("caso2");
    PlayerPrefs.DeleteKey("caso3");
    PlayerPrefs.DeleteKey("caso4");
    som *= -1;
    ativarSom = 1;

}

if(som == 1 && efeitos == 1){
    PlayerPrefs.SetInt("caso1", acustica);

}

if(som == 1 && efeitos < 1){
    PlayerPrefs.SetInt("caso2", acustica);

}