With the T-Mobile 55+ plan you can add $25/month to the bill and you get FULL UNLIMITED data but you have to use the phone as a hot-spot. The salesman showed me his phone and his data usage for the month was over 125 Gig and still going. There is also a $10/month add-on for more high speed data but I got a call and had to leave before I got the details. If I have 2 phones around I really don't see where using one of them as a hotspot would be problematic other than having to thing about turning the service on and off.