As Talmidim in Yeshiva, our main focus should be learning with Hasmada and Shkidah. Therefore, it is prohibited to possess or use any device other than a basic phone (if necessary), and even then, it should not be used during Seder.
If, for some reason, A Talmid requires a device (supporting internet access, including a phone, tablet, etc.), he must obtain Reshus from the Hanhala and is also required to install the Yeshiva's filter. See below.