Has the best coverage in Greensboro are.
However, it does not offer the service in Japan.

Visit Our Website: verizon.com

For the business persons traveling globally, AT&T has the best coverage in the countries outside US.
In Greensboro, AT&T has more "no dignal" area than Verison. You can improve this issue by signing up with AT&T's fiber optiics internet service and getting the signal booster, but this trick would not be useful when the power is out.

Visit Our Website: att.com

Visit Our Website: duke-energy.com