Hi! Yesterday I activated a new 2 year plan, 39 dollars for 10 gigs of data and around 3 dollars a month on Tab Plus for a refurbished iPhone. Today I saw the same plan advertised with tab plus, except for 60 gigs. Am I able to keep the same Tab Plus price while switching my plan from 39 dollars for 10 gigs to 39 dollars for 60 gigs? Thanks !