I am coming to states for 20 days (traveling around from city to city), and I need some kind of mobile internet.
What is the best option for me?
a) Prepaid card for iPad3
b) Prepaid card + USB stick in my notebook
b) Prepaid card for my mobile + tethered notebook
20$ (1GB) is enough for me (email + few pictures upload to FB).
Ipads that are compatible with the VZW network you can purchase a month's time for $20, and you can do it from the Ipad. If you go with a usb stick, you will pay $50 for 1gb of data for a month. So I would definitly go with the Ipad, since the Ipad3 as you said is a 4g device, so cheaper and faster speeds.