Website.
Edit: HOLY SMOKES! I don't know what I was smoking, but I go there now and can't find a setting for it! What the.....
I'm sorry.... I guess I musta had a gray moment or something. Damn, I coulda sworn it was there. Darn.
Anyway, if you go to Change Features and select to View all features, you will see "4G SMARTPHONE HOTSPOT". Apparently this is the designator for unlimited MHS/MBBC. However, I can not find a way to turn it on/off on-line. You can sign up for the limited plans, but nowhere is the free unlimited plan. I guess we'll still have to call. The rep had told me different (big surprise). Anyway, he also told me you could turn it off/on whenever you wanted and be prorated. Even if you have to call that's still pretty good. I'm not gonna be the first one to test that because I actually need mine about every day. However, whomever does test that theory, please report your success/failure here...
-Frank