What phone do you have?
What plan are you on?
Does your plan include data, or just talk & text?
i have an old refund plan with .5 data, got a notice it was running out with only 3 days left in the month, I bought data to keep it safe and when the new month hit I just kept using my cell data thinking I was ok. BUT I was not, now I have used 75% of my cell data for march because I thought I and an extra 1 gig.