We live rural and don't have internet at home or on the road. ATT & Verizon both have an internet module. Either plug it into USB port or for lap top just set it nearby. Both have password entry where you can create good security. I use about 12 character entry. The only difference is coverage area. We have both. ATT is called "Sierra". Verizon is called "Jet Pack" You can connect 2 computers. ATT rolls over what you don't use. In our area either works well. Both charge by USB port or wall plug using USB port. Out of our immediate area Verizon seems to have better coverage. However, ATT seems to have better PR. I have stock in both. Both are good companies paying 5% dividends on their stock. If you use Verizon I would go with the "Jet Pack" JMHO.