Clear is having the best Clear Spot sale ever - just for today and tomorrow - for only $20, there is no term commitment.
You can use it as a mobile hotspot service to any Apple mobile devices (iPad, iPhone, iPod touch) or any other mobile devices. Service contract starts at $25/month, no term commitment.
You need to visit www.clear.com/holiday-sale to get it.
If you also want to add a Clear Spot Mobile Router, Amazon has it on sale too (but just a small discount).