I currently have a family plan with 5 phones and 1 tablet and am paying way too much. I would like to switch to Tmobile. 4 of the phones have contracts up in a month but the other phone and tablet have another year. However we do not use those lines, they were added in order to get a premature phone upgrade (I now see the mistake I made there..). What ETFs am I looking at for those two lines? What would be the best way to change to Tmobile?