"enroll"

So I’ve been trying for a few days to “enroll” my modem with the phone company but could not get it to work. Once I enroll, I will have 8GB to use for 30 days. Instead, I’ve been paying using vouchers, which is expensive. Today I was finally able to enroll! Of course it was after I had used the internet (and most of my voucher) but now I basically have a month of unlimited internet, as long as the computer keeps working. Then I talked with my grandparents for a few minutes this evening. A good day all in all I think.