T-Mobile's $70 unlimited everything plan for smartphones includes 2.5 GB of tethering. So I'm expecting to use the iPad's free 200 MB when I want to do somethi

T-Mobile's $70 unlimited everything plan for smartphones includes 2.5 GB of tethering. So I'm expecting to use the iPad's free 200 MB when I want to do something quickly on the iPad, but use WiFi or tethering for extended browsing.