There is a 5gb monthly cap whichever you use, although I have read in some posts that with an Unlimited Simply Everything Plan that the 5gb cap does not apply although this is not that clear, and should be looked into further to make sure. If you tether and the setting says PAM, and you don't have a PAM plan, and Sprint sees that, they will most likely notify you to purchase a PAM plan or stop or cancel your service
