Q. What happens when I reach the current 3G/4G data high speed limit? Q. What happens when I reach the current 3G/4G data high speed limit? September 13, 2016 1111 You will still have unlimited data at no extra charge, but you will connect at a slower 2G/3G speed. Tags iPhoneMiFiSIM Card 0 Newer Q. Is there a sim card option for a plan without data? View all posts Older Q. When does my high speed internet reset?