1
AT&T
Oldest phone company still connecting America
att.com
2
Google Fi
Google's smart network switching carrier
fi.google.com
5
Verizon
Can you hear me now? — America's network
verizon.com
6
Visible
Verizon network at prepaid prices
visible.com
7
Vodafone
European mobile giant in 20+ countries
vodafone.com