For AT&T the tiered plans were introduced about 18 months ago. So if you switched to the 2 GB plan immediately and never went over, you should have saved $90 by now. If you are on the 200 MB plan you could have saved up to $270 by now. So for those that dropped unlimited, how much have you saved? Include any overages you've paid as negative in the amount you saved. For me personally the number is $120. I switched immediately, and also dropped to the 200 MB plan for 3 months, but I no longer have WiFi at work so I need to be on the 2 GB. I probably average 400 MB in data usage now. If you switched to a tethering plan you don't count since tethering is not available with unlimited.