[hamagc]

i have yet to be charged. just make sure you use "Data" not "Phone as Modem".

using the phone as modem option is where they will charge you if they find out (unless you have phone as modem as part of your plan).

using data makes it look like you are surfing on your phone, not on your laptop.

they only real scare is the 5gb limit. i have heard of people going well over the 5gb cap without issue but i have also heard of people going over the 5gb cap and getting hit with charges for it.