Hi Aspirant,
Amrita University allows smart phones and its campus(+hostel) has free Wi-Fi for students.However they are prohibited to be used in Academic blocks, especially Class rooms.Laptops, Gadgets and Mobiles are allowed in the hostel premises, while Laptops are allowed even in classrooms for academic purposes only.
Check out the official website of Amrita University for more information
https://www.amrita.edu /
Hope this helps.
Thank You!