Talk:United States/@comment-26674008-20150713234415

If you absolutely must have the best coverage, Verizon is a realistic option for prepaid data, if you are willing to carry a hotspot around - they are called 'jetpacks' and the devices can be found used, cheap on many retail websites, and can do 3G+4G LTE. Theoretically activation can be done online, but in my experience that is unreliable and you will usually have to visit a verizon store, or (if you are in possession of a new verizon SIM) by calling customer support and requesting help from a real person. Expect to pay a lot per GB.

If possible, I would go with an AT&T network provider as I think they are usually faster and cheaper and have almost as good coverage as verizon. If you know you are only going to be in major cities, T-mobile is very popular, but the signal will disappear quickly outside of city/major interstate.