Walmart has the contract-free Virgin Mobile U600 3G/4G Prepaid USB Adapter for $34.88 (69.99 – 35.11 instant savings) for a limited time. Shipping adds $3.97 or you can opt to have it shipping to a local Walmart store or FedEx Office locations for pickup for Free.
This U600 USB stick allows you to switch between 3G and 4G networks depending on available coverage and provides 32MB RAM and 128MB ROM. This Franklin U600 stick utilizes a USB 2.0 interface. Your U600 USB stick includes a Connection Manager that makes installation easy and gets you connected fast. Monthly plans start at $35 per month (or $5/day) without a contract.