I still have the ATT unlimited data from way back and I want to use the hotspot for my wifi iPad. Of course I can't do that unless I switch to the 2GB / $25 per month plan and add the tethering plan. I looked back at the last 12 months of data usage And I've never gone over 500mb. But, I'm nervous about letting go of the unlimited because once it's gone, it's gone. Have any of y'all here switched over and then ended up using way more data than you thought you would, since it was available at times when it wasn't before?