On a 3G device with grandfathered unlimited data, the only option to add mobile hotspot is $20/month for 2 gigs of data for mobile hotspot. On a 4G device with grandfathered unlimited data, the only option to add mobile hotspot is $30/month for unlimited data for the mobile hotspot.
</thread>
Thanks for the post I just added the 4G mobile hotspot for $30 to my unlimited data plan on my iPhone 5. I added it online. I am also surprised I get a discount on the hotspot like I do on rate plan & data plan.
Customer care kept on telling me there is no $30 option just a $20 option for 2 GB. Customer care did tell me that they have offered unlimited data for hotspot for 4G devices before but the option to add it is gone. I recently canceled my unlimited data for $59.99 USB 3G Data Card so the mobile hot spot will come in handy when I have my laptop with me.