Karen is thinking of moving over to T-Mobile from Google Fi. They have a good deal for people 55 and over. It should be about the same in quality, right? Rich says that Google Fi uses three different carriers, automatically switching to whichever one is best. It can be pricey for an unlimited user. If she doesn't use a lot of data, then Google Fi is a great 'pay as you go' plan. But T-Mobile has a great plan for those age 55 and over — 2 lines for $60. It's hard to beat that.