There are no restrictions for using mobile phones in most of the pharmaceuticals colleges. Although if your college restricts from use of cell phones then its a separate case. So you have to check the official website of the college/disciplinary measure of the college in your college prospectus in order to be sure about the disciplinary measures induced by your college.

To know more about B.Pharm as a career visit the link below:

https://www.careers360.com/courses/b-pharma-bachelor-of-pharmacy

I hope this answer helps. All the very best for your future endeavors!