vibration

I set my phone to vibration.

私は携帯を振動に変えます

I set my phone to vibration in the classroom.

私は教室で携帯を振動に変えます

Before class I set my phone to vibration in the classroom.

私は授業の前に教室で携帯を振動に変えます

Before class I always set my phone to vibration in the classroom.

私は授業の前に教室でいつも携帯を振動に変えます

Before class I always set my phone to vibration quietly in the classroom.

私は授業の前に教室でいつも静かに携帯を振動に変えます