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Just go to a local McDonalds or Starbucks, they usually have free WiFi.
If you're staying at a hotel, they normally provide wifi access as well.

Most places of business offer wifi (some guest, some secure), which will free up some money to spend during your travels. However, if you want that secure layer to give you peace of mind, I suggest Googling.

TL;DR

• https://alldayinternet.com/internet-wifi-travellers-usa/
• http://www.daypasswireless.com/

It depends on where you are visiting. AT&T and Verizon are the two biggest companies. They should be able to cover all the states you are travelling.

mobile+wifi is a hair confusing to me.. if you mean mobile 4g connection for internet, then i'd suggest checking out t-mobile, at&t, or verizon for their services. if you mean mobile wifi rental services literally, then probably mcdonalds, starbucks, & hotel services are your best bet.

either way, have fun on your trip. ^^

Thanks for the hidden unbundled giveaway! BUMP!
discovered it by accident

Comcast sells hotspot access to their "xfinitywifi" i think for like $15 usd /month. The access point is running pretty much everywhere.