Brent, on ATT, I received a text that it would be $15 for 1 gb if we went over. Once my son gets wifi access, I will likely never see that warning again. Shelly, never say never, but I really don't think you would ever need more than 12 gb. I typically do not stream music as I just download what I want from Tidal. I also do not use my phone to watch video beyond the occasional youtube video. I do using the web, FB, Instagram, mail, daily and I do not believe I go much over 4 gb.