Hello! This mod is called CubePhone. This mod was made using the MCreator 2019.5 EAP Snapshot, this mod is built for 1.14.4! It adds a working phone into MInecraft. Some of it's current features are the creative tab, the phone itself, and a GUI.
This mod is outdated, broken, and isn't worth downloading to be honest. So don't. I made this one morning because I was out of ideas for my primary mod, Mandy's Ice Cream Mod. I don't plan to update this anymore, so don't expect there to be any updates besides stuff to keep the mod from being removed off this site.