Phone SIM card

[plymouth4onthefloor]

I need a phone card with unlimited data download for my holidays in the USA. Is there a suggest for easy buying like a walmart and which brand, T Mobile AT&T or equal. We need it for navigation and Google.
Thank you

 

[Scody21]

I use to have Mint Mobile. They run on the T-mobile network. It’s prepay and cheep.

 

[Phreakish]

What part of the country? Coverage varies, as does the provider with the most coverage.
My only experience with prepaid has been Verizon and t-mobile. Both have worked well, Verizon has more coverage and faster. For a truly "unlimited" deal you can expect to pay more but the basic prepaid plans typically include the first 1-5gigs of data and are around $50usd for a month. Ymmv.

 

[plymouth4onthefloor]

Thank you guys, found a nice offer, t-mobile 30days unlimited for 40USD! T Mobile has a nice countrywide coverage speciall. east coast!