If my Internet goes down at home I just have to plug my phone into the computer, click a confirmation button, and it will switch over to using cell data automat

If my Internet goes down at home I just have to plug my phone into the computer, click a confirmation button, and it will switch over to using cell data automatically. Unfortunately this no longer works well, as hurricane Irma damaged the cell tower near my house and I only get a few hundred Kbps now. :-(